NOAA's Response and Restoration Blog

An inside look at the science of cleaning up and fixing the mess of marine pollution


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Debunking the Myths about Garbage Patches

This week, NOAA’s Office of Response and Restoration is looking at some common myths and misconceptions surrounding oil spills, chemical releases, and marine debris.

Garbage floating on water as seen from underneath.

You may have envisioned the garbage patches looking something like this, but that’s pretty far from the truth. (NOAA)

Although most of us have heard the term “garbage patch” before, many may not have a full understanding of what the term really means. In recent years, there has been a lot of misinformation spread about garbage patches and so now, we are here to try to clear up some of these myths.

First, what are garbage patches? Well, garbage patches are areas of increased concentration of marine debris that are formed from rotating ocean currents called gyres and although they may not be as famous as the “Great Pacific Garbage Patch,” there are actually several garbage patches around the world! So let’s address some of the most common questions and misconceptions about garbage patches:

Are garbage patches really islands of trash that you can actually walk on?

Nope! Although garbage patches have higher amounts of marine debris, they’re not “islands of trash” and you definitely can’t walk on them. The debris in the garbage patches is constantly mixing and moving due to winds and ocean currents. This means that the debris is not settled in a layer at the surface of the water, but can be found from the surface, throughout the water column, and all the way to the bottom of the ocean.

Ocean with horizon.

It possible to sail through a garbage patch without even realizing it! (NOAA)

Not only that, the debris within the garbage patches is primarily microplastics, tiny plastic pieces less than five millimeters in size. Many of these microplastics are the result of larger plastic debris that has broken into small pieces from exposure to the sun, salt, wind, and waves. Others, such as microbeads from products like facewashes or microfibers from synthetic clothing, are already small in size when they enter the water. With such small debris items making up the majority of the garbage patches and the constant movement of this debris, it’s possible to sail through a garbage patch without even realizing it.

 

The Great Pacific Garbage Patch is the size of Texas and you can see it from space!

Not so much. Since the garbage patches are constantly moving and mixing with winds and ocean currents, their size continuously changes. They can be very large, but since they’re made up primarily of microplastic debris, they definitely can’t be seen from space.

Why don’t we just clean them up?

Unfortunately, cleaning up the garbage patches is complicated. Since the debris making them up is not only constantly mixing and moving, but also extremely small in size, removing this debris is very difficult. We generally focus removal efforts on our shorelines and coastal areas, before debris has the chance to make it to the open ocean and before they have broken into microplastic pieces, which are inherently difficult to remove from the environment.

Hand holding small white plastic ball.

Since the garbage patches are primarily made up of very small microplastic debris that is constantly mixing throughout the water column, they definitely can’t be seen from space. (NOAA)

It possible to sail through a garbage patch without even realizing it! (NOAA)

However, preventing marine debris is the key to solving the problem. If you think about an overflowing sink, it’s obvious that the first step before cleaning up the water on the floor is to turn the faucet off—that’s prevention. By working to prevent marine debris through education and outreach, and each doing our part to reduce our contribution, we can stop this problem from growing.

Want to learn more about the garbage patches? Check out this blog post or visit the NOAA Marine Debris Program website where you can find more information as well as our Trash Talk video on the Great Pacific Garbage Patch.

Different Types of Plastic Litter Lead to Different Types of Effects in Animals

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On Thursday Marine Debris will have a Reddit “Ask Us Anything” on microplastics.Tune in at 1 pm EDT to check out the conversation with the NOAA science team and ask some microplastics questions!

NOAA's Marine Debris Blog

This week marks “Research Week” on our blog and we will be highlighting marine debris research projects throughout the week! Research is an important part of addressing marine debris, as we can only effectively address it by understanding the problem the best we can.

By: Chelsea M. Rochman, Guest Blogger and Assistant Professor in the Dept. of Ecology and Evolutionary Biology at the University of Toronto

When I go to the beach, anywhere in the world, I can kneel down and find small bits of plastic litter in the sand—these bits are called “microplastics.” Microplastic has become a common pollutant. It can be found globally, from the equator to the poles, in the ocean, lakes, and rivers. Microplastics are also eaten by and can be found inside nearly 700 species of animals, which likely mistake them for food.

If you take a closer look at this litter, you will notice…

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Restoring a Coral Reef Hit by Tanker in Puerto Rico

Scuba diver underwater near rocks.

A diver rescued live coral for emergency reattachment. Photo taken less than 12 hours after grounding shows how fast NOAA mobilized. (Sea Ventures Inc. photo)

U.S. coral reefs are impacted by 3 ­- 4 large groundings a year.  On Dec. 15, 2009 the danger became reality near Guayanilla Bay, Puerto Rico when the liquid natural gas carrier Matthew grounded on the coral reef there causing substantial harm. It wasn’t just the grounding that injured the coral. During attempts to free the tanker the bow of the ship was moved from side to side causing further injury to the reef structure.

Although no oil was spilled, by the time the ship was removed a total of 3,200 square meters (about 34,444 square feet) of living coral reef was mangled or destroyed.

National Oceanic and Atmospheric Administration and the Puerto Rico Department of Natural and Environmental Resources officials have been working on a restoration plan for the area, which is now available for public comment. The period for comments ends Feb. 10, 2017.

In the aftermath of groundings, impacted corals are often broken, dislodged, or flipped over. These fragments are subject to abrasion, scour, and sedimentation, which ultimately result in death. Unchecked, these damages can result in additional reef loss and instability. However, if dislodged fragments can be collected and stabilized shortly after physical impacts then the probability of survival increases substantially. After the grounding a triage team of divers, which included NOAA, salvaged live corals from the rubble. The corals were cached in a safe, stable underwater area in an effort to keep them alive until they could be permanently reattached.

The emergency restoration actions lasted through 2010 and were designed to address most of the potential restoration actions that might be needed for the injured reef.  Emergency response efforts were able to save about 7,000 corals.

Restored coral reef.

Fully restored coral in Guayanilla Bay, Puerto Rico provides recreation and commercial benefits. NOAA

Species harmed included fractured and crushed hard corals (scleractinian), dislodged soft corals (octocorals). Staghorn coral, classified as threatened under the Endangered Species Act were also injured and swaths of the sea floor were scraped and pulverized.

Coral reefs are one of the most economically valuable ecosystems on earth, providing hundreds of billions of dollars in food, jobs, recreational opportunities, and coastal protection. NOAA has the responsibility to conserve coral reef ecosystems under the Coral Reef Conservation Act of 2000.

You can read more about how NOAA is working to restore damages reefs in the following articles:

NOAA and Partners Work Quickly to Save Corals Hit by Catamaran in Puerto Rico

How NOAA Uses Coral Nurseries to Restore Damaged Reefs

How to Restore a Damaged Coral Reef

How Do Oil Spills Affect Coral Reefs?

The Ship M/V Jireh Runs Aground a Coral Reef in Puerto Rico


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Deadline Extended: FY17 Community-based Marine Debris Removal Grant Opportunity

There is still time to apply for the grants.

NOAA's Marine Debris Blog

The deadline for the NOAA Marine Debris Program’s 2017 “Community-based Marine Debris Removal” federal funding opportunity has been extended due to disruption from Hurricane Matthew affecting many of our potential applicants. The new deadline is Thursday,October 202016.

This opportunity provides funding to support locally-driven, marine debris assessment and removal projects that will benefit coastal habitat, waterways, and NOAA trust resources. Projects awarded through this grant competition implement on-the-ground marine debris removal activities, with priority for those targeting medium- to large-scale debris, including derelict fishing gear and abandoned and derelict vessels. There is also a secondary priority for projects that conduct post-removal habitat monitoring to assess the beneficial impacts of debris removal. Through this funding opportunity, NOAA works to foster awareness of the effects of marine debris to further the conservation of living marine resource habitats, and contributes to the understanding of marine debris composition, distribution, and impacts…

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In Florida, Rallying Citizen Scientists to Place an Ocean-Sized Problem Under the Microscope

This week, we’re exploring the problem of plastics in our ocean and the solutions that are making a difference. To learn more about #OceanPlastics this week, keep your eye on Facebook, Twitter, Instagram, NOAA’s Marine Debris Blog, and, of course, here.

Young woman filling a one liter bottle with water along a marshy beach.

Florida Sea Grant has been teaching volunteers how to sample and examine Florida’s coastal waters for microplastics and educating the public on reducing their contribution to microplastic pollution. (Credit: Tyler Jones, University of Florida, Institute of Food and Agricultural Sciences)

Have you ever looked under a microscope at what’s in a sample of ocean water? What do you think you would find?

These days, chances are you would spot tiny bits of plastic known as microplastics, which are less than 5 millimeters long (about the size of a sesame seed).

The Florida Microplastic Awareness Project is giving people the opportunity to glimpse into Florida’s waters and see a microscopic world of plastic pollution up close. This project integrates citizen science—when volunteers contribute to scientific research—with education about microplastics.

I recently spoke with Dr. Maia McGuire of Florida Sea Grant. She’s leading the Florida Microplastic Awareness Project, which is funded by a grant from the NOAA Marine Debris Program. NOAA’s Office of Response and Restoration, of which the Marine Debris Program is a part, has a long history of collaborating with Sea Grant programs across the nation on a range of issues, including marine debris.

The NOAA Marine Debris Program has funded more than a dozen marine debris removal and prevention projects involving Sea Grant, and has participated in other collaborations with regional Sea Grant offices on planning, outreach, education, and training efforts. Many of these efforts, including the Florida Microplastic Awareness Project, center on preventing marine debris by increasing people’s awareness of what contributes to this problem.

Combining Science with Action

Blue and white plastic fibers viewed under a microscope.

Volunteers record an average of eight pieces of microplastic per liter of water, with seven of those eight identified as plastic fibers (viewed here under a microscope). (Credit: Maia McGuire, University of Florida, Institute of Food and Agricultural Sciences)

This latest effort, the Florida Microplastic Awareness Project, involves building a network of volunteers and training them to collect one liter water samples from around coastal Florida, to examine those samples under the microscope, and then to assess and record how many and what kinds of microplastics they find.

“Everything is microscopic-sized,” explains McGuire. “We’re educating people about sources of these plastics. A lot of it is single-use plastic items, like bags, coffee cups, and drinking straws. But we’re finding a large number are fibers, which come from laundering synthetic clothes or from ropes and tarps.”

Volunteers (and everyone else McGuire’s team talks to) also choose from a list of eight actions to reduce their contribution to plastic pollution and make pledges that range from saying no to plastic drinking straws to bringing washable to-go containers to restaurants for leftovers. For those who opt-in, the project coordinators follow up every three months to find out which actions the pledgers have actually taken.

“It’s been encouraging,” McGuire says, “because with the pledge and follow up, what we’ve found is that they pledge to take 3.5 actions on average and actually take 3.5 actions when you follow up.”

She adds a caveat, “It’s all self-reported, so take that for what it’s worth. But people are coming up to me and saying, ‘I checked my face scrub and it had those microbeads.’ It’s definitely resonating with people.”

Microplastics Under the Microscope

The project has trained 16 regional coordinators, who are based all around coastal Florida. They in turn train the volunteer citizen scientists, who, as of June 1, 2016, have collected 459 water samples from 185 different locations, such as boat ramps, private docks, and county parks along the coast.

“Some folks are going out monthly to the same spot to sample,” McGuire says, “some are going out to one place once, and others are going out occasionally.”

After volunteers collect their one liter sample of water, they bring it into the nearest partner facility with filtration equipment, which are often offices or university laboratories close to the beach. In each lab, volunteers then filter the water sample, using a vacuum filter pump, through a funnel lined with filter paper. “The filter paper has grid lines printed on it so you’re not double counting or missing any pieces,” McGuire adds.

Once the entire sample has been filtered, volunteers place the filter paper with the sample’s contents into a petri dish under a microscope at 40 times magnification. “Because we’re collecting one liter water samples, everything we’re getting is teeny-tiny,” McGuire says. “Nothing really is visible with the naked eye.”

Letting the filter paper dry often makes identifying microplastics easier because microscopic plastic fibers spring up when dry. And they are finding a lot of plastic fibers. On average, volunteers record eight pieces of microplastic per liter of water, and of those, seven are fibers. They are discovering at least one piece of plastic in nearly all of the water samples.

“If they have questions about if something is plastic, we have a sewing needle they heat in a flame,” McGuire says, “and put it under the microscope next to the fiber, and if it’s plastic, it changes shape in response to the heat.”

Next, volunteers record their data, categorizing everything into four different types of plastic: plastic wrap and bags, fibers, beads, or fragments. They use online forms to send in their data and log their volunteer information. McGuire is the recipient of all that data, which she sorts and then uploads to an online map, where anyone can view the project’s progress.

A Learning Process

Tiny white and purple beads piled next to a dime.

These purple and white microbeads are what microplastics extracted from facial scrub looks like next to a dime. Microbeads are being phased out of personal care products thanks to federal law. (Credit: Dave Graff)

“When I first wrote the grant proposal—a year and a half ago or more—I was expecting to find a lot more of the microbeads, because we were starting to hear more in the news about toothpaste and facial scrubs and the quantity of microbeads,” McGuire relates. “It was a little surprising at first to find so many [plastic] fibers. We have some sites near effluent outfalls from water treatment plants.”

However, McGuire points out that what they’re finding is comparable to what other researchers are turning up in the ocean and Great Lakes, except for one important point. Many of those researchers take water samples using nets with a 0.3 millimeter mesh size. By filtering through paper rather than a net, McGuire’s volunteers are able to detect much smaller microplastics, like the fibers, which otherwise would pass through a net.

“I think one big take-home message is there’s still so much we don’t know,” McGuire says. “We don’t have a lot of knowledge or research about what the impacts [of microplastics] actually are. We need a lot more research on this topic.”

Learn more about what you can do to reduce your contribution to plastic pollution, take the pledge with the Florida Microplastic Awareness Project, and dive into the research projects supported by the NOAA Marine Debris Program, which are exploring:


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What You Can Do to Keep Plastic out of the Ocean

This week, we’re exploring the problem of plastics in our ocean and the solutions that are making a difference. To learn more about #OceanPlastics this week, keep your eye on Facebook, Twitter, Instagram, NOAA’s Marine Debris Blog, and, of course, here.

A Starbucks coffee cup on a sandy beach by a seabird and people picking up trash.

Keeping a reusable mug in your bag or car can help you remember to opt out of much of the single-use plastic waste that inundates our lives. This coffee cup ended up on a beach in the Northwestern Hawaiian Islands, thousands of miles from the nearest city. (NOAA)

“Plastic doesn’t go away.” This point was really driven home for me after watching the video, “Open Your Eyes,” which is narrated by Jeff Bridges and produced by the Plastic Pollution Coalition. It serves to remind us how much single-use, disposable plastic we can go through in an average day—and the impacts of all that plastic on the natural world.

The majority of marine debris found around the world is made of plastic. The world’s more industrialized nations, including the United States, create a huge amount of plastic, and unfortunately too much of it ends up in earth’s waters and along its coastlines. The United Nations Environment Programme (UNEP) predicts [PDF] that in the future, as more countries become industrialized, the amount of plastic waste in the ocean will increase as well.

Reflecting on the pervasiveness of single-use disposable plastics, which are manufactured to be used once and thrown away, has forced me to look at my own behavior and ask myself, What types of plastic do I personally use in my daily life? How could we all use less plastic? And what could we do to keep the plastic we do use out of the ocean?

Here are a few areas to get started:

  1. Snacks. I tend to dash out of the house with grapes or apple slices in a plastic bag to eat while driving to work or the gym. A logical alternative would be to eat at home and skip the bag (eating in the car is a bad habit anyway!) or pack snacks in a reusable container.
  2. Coffee. On my way to work, I stop for a latte, complete with plastic lid so it won’t spill while I’m drinking it in the car. It would be better to drink it at the coffee shop in their ceramic mugs—it doesn’t take that long and doesn’t require a plastic lid. Better yet is to bring your own to-go mug.
  3. Grocery shopping. When I buy fresh fruits and vegetables, I could skip the provided plastic bags, or opt for paper or reusable mesh produce bags. Other things to consider at the supermarket: Buying foods like yogurt, cereal, and oatmeal in bulk, rather than single-serving packages; choosing a product packaged in cardboard or glass rather than plastic, such as cleaning products, ice cream, milk, condiments, and soda; and bringing your own grocery bags or boxes to get everything home.
  4. Eating out and on the go. At lunch I frequently buy salads to go in those plastic “clamshell” containers; better to bring food from home in a non-disposable container or buy something that doesn’t come encased in plastic. A lot of restaurants automatically include a straw in your iced tea or soda, so asking the wait staff to skip the straw when ordering makes sense (or bring your own glass or metal straw). Opt to drink water and other refreshing beverages out of a reusable glass or bottle, but if necessary, reuse and then recycle any plastic bottles and cups you do use. When taking food home or to-go, bring your own resusable containers and utensils, and skip the plastic forks, spoons, and to-go containers.
  5. Dry cleaning. Let your dry cleaners know you’d prefer to pick up your clean clothes without the plastic coverings.
  6. Cosmetics. Cosmetics and personal care manufacturers are phasing out polyethylene microbeads from cosmetics, cleansers, and toothpastes, which have been banned in the United States, but until the phase-out is complete, check labels and avoid products with “polyethylene” in the ingredients. Because of their tiny size, microplastics which are usually added to products as an abrasive (like exfoliants) pass through water treatment systems and end up in the ocean and Great Lakes.
  7. Trash cans. Open and overflowing trash cans (or recycling bins) don’t do much to keep trash off the street and out of our waterways. Use waste containers with a lid, and never toss trash on top of an overflowing trash can. Take it with you instead and recycle what you can.
  8. Beaches. When you visit the beach, pack out all your trash and pick up any trash you do see there (and report it with our Marine Debris Tracker smartphone app). Better yet, join beach cleanups to help remove trash from our waterways and coasts (which helps keep bigger plastics from breaking down into microplastics).
  9. Science. Join citizen scientists around the country and adopt a shoreline to help monitor how much and what kinds of plastic and other marine debris wash up each month. You can check out an existing project near you, such as the Florida Microplastic Awareness Project and the projects in National Marine Sanctuaries up and down the West Coast. Or start your own dedicated effort using these tools and resources and report your data to our national database.
  10. Community. We can all talk to our friends, family, students, or coworkers about the issue of plastics in the ocean and share this list of actions they can take too.

These steps are just a start, but they’re all things we can do with minimum impact to our daily lives. Even incorporating one of these actions into your life can make a difference in the amount of plastic pollution in our ocean.

As the lead federal agency for addressing this problem, the NOAA Marine Debris Program funds research on the harmful effects of debris, such as plastics, to the marine environment and efforts to clean up our nation’s coastal waters. They have lots of education and outreach materials with more information about the many ways we, as individuals, can help remedy this growing problem of plastics in our ocean.


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Innovative Solutions to Tackling Plastic Pollution in the Ocean

This week, we’re exploring the problem of plastics in our ocean and the solutions that are making a difference. To learn more about #OceanPlastics this week, keep your eye on Facebook, Twitter, Instagram, NOAA’s Marine Debris Blog, and, of course, here.

Washed Ashore founder Angela Haseltine Pozzi with a giant marlin statue made of marine debris.

Washed Ashore Executive Director Angela Haseltine Pozzi leads a lesson on how marine debris can be used as a powerful art medium to engage students on the topic while at the Smithsonian’s National Zoo. Behind her is one of her organization’s marine life sculptures crafted entirely from trash retrieved from the ocean and coasts. (NOAA)

You don’t have to get too fancy in order to help keep plastic and other marine debris out of the ocean. Solutions can be pretty simple: Reducing your use of single-use, “disposable” plastic items; picking up a plastic wrapper littered on the sidewalk; participating in a beach cleanup. (Stay tuned: we’ll get deeper into ways you can help later this week.)

Sometimes, however, the particulars of this problem can be more complex. Sometimes just getting people’s attention and encouraging them to take those simple actions require more creative approaches. We’ve rounded up a few projects that have our attention, projects which are aimed at making a dent in the many problems associated with ocean plastics.

Know of another notable ocean plastics project? Let us know in the comments or on social media using #OceanPlastics.

Turning what’s Washed Ashore into powerful pieces of art

A large, bright orange fish sculpture made from ocean trash, mostly plastic.

Washed Ashore rallies volunteers to clean beaches, using the collected debris to create larger-than-life sculptures of the marine life affected by ocean trash. Here, Henry the Fish stands outside Washed Ashore’s gallery in Bandon, Oregon. (NOAA)

Walking southern Oregon’s otherwise beautiful beaches, artist Angela Haseltine Pozzi began despairing how much plastic pollution seemed to appear on its shores. Inspired to turn that pollution into something more positive, she rallied volunteers to clean the beaches and turn the trash into sculptures of the marine life affected by plastic pollution. That’s how Washed Ashore was born. In addition to creating these larger-than-life recycled sculptures, Washed Ashore’s latest project, funded by the NOAA Marine Debris Program, incorporates theater, movement, and creative writing into a curriculum for teaching students about marine debris.

From a sleek marlin to an inquisitive puffin, Washed Ashore’s mostly plastic, often massive sculptures serve as dramatic backdrops—and powerful ocean ambassadors—for these educational programs in zoos, aquariums, and museums around the country. According to Washed Ashore, since its inception in 2010, the program has processed 38,000 pounds of marine debris, turning it into more than 60 sculptures.

Transforming lost fishing nets into energy

Man using a forklift to place old fishing nets in a collection dumpster.

Since begun in 2008, the Fishing for Energy partnership has removed and diverted 3 million pounds of fishing gear from the ocean. (Credit: National Fish and Wildlife Foundation)

The Fishing for Energy partnership helps fishermen properly dispose of old and abandoned fishing nets and other gear—much of it plastic—at no cost to the fishermen. In addition to donating their own worn-out nets, some fishermen also directly retrieve lost fishing gear out of the ocean. After being collected and sorted, any metal parts are recycled, and everything else is converted into electricity, with roughly one ton of old nets producing enough electricity to power a house for 25 days.

The National Fish and Wildlife Foundation works with the NOAA Marine Debris Program, Covanta, and Schnitzer Steel Industries, Inc. to carry out this partnership, which has expanded to include funding other projects that seek to prevent or remove lost fishing gear in U.S. coastal waters.  Since it started in 2008, the Fishing for Energy partnership has removed and kept 3 million pounds of fishing gear out of the ocean.

Rethinking “disposable” plastic at dinner time

Left: Salad in a to-go container with plastic fork and dressing cup. Right: Salad in a ceramic bowl with metal fork and dressing cup.

The Clean Water Fund’s ReThink Disposable campaign works with San Francisco Bay-area food businesses and institutional food services to help them find more sustainable alternatives to disposable plastic food and beverage packaging. (Credit: Clean Water Fund)

Plastic straws, cups, plates, bags, forks, and spoons turn up among the most frequently found items at beach cleanups year after year. Eating with these so-called “disposable” plastics creates huge amounts of waste, and the Clean Water Fund, with the support of the NOAA Marine Debris Program, is working to stem this flow of food-related plastics coming from restaurants in California’s San Francisco Bay region.

Through their ReThink Disposable campaign, Clean Water Fund is collaborating with local food businesses and institutional food services by auditing their waste and helping to find more sustainable alternatives to disposable plastic food and beverage packaging. They’re also working with the businesses to communicate to the public the benefits of cutting down on this type of waste and how it impacts the environment.

One of them, El Metate Restaurant, a fast-casual Mexican restaurant, swapped plastic cutlery and salsa cups, previously provided to both dine-in and take-out customers, for reusable metal cutlery and ceramic salsa bowls. After implementing these changes, not only did El Metate manage to keep 493,711 disposable food ware items out of the landfill (and coastal waters) each year, but the changes improved the dining experience, increased dine-in customers, and is saving nearly $9,000 a year.

Diving deep into the belly of a whale to see impacts to wildlife

A circle of students and teachers with trash in the middle and the inflatable whale in the back of the gymnasium.

The University of North Carolina Wilmington MarineQuest’s Traveling Through Trash program takes students inside the belly of a 58-foot-long inflatable whale, Watson, to teach about the impacts of ocean trash on marine life. (Credit: University of North Carolina Wilmington)

Few things can communicate the scale of plastic’s impacts on wildlife like walking inside a life-sized inflatable whale and “dissecting” its organs to uncover the marine debris it’s swallowed. That’s exactly what middle and elementary school kids in rural North and South Carolina have the opportunity to do through the University of North Carolina Wilmington MarineQuest’s Traveling Through Trash program, which received funding from the NOAA Marine Debris Program.

People have found plastic bags, rope, juice packs, broken CD cases, and much more inside dead whales. Watson, the 58-foot-long inflatable right whale, offers students the chance to experience this reality close up and learn how they can take responsibility for keeping trash, no matter where it comes from, far away from the ocean and marine life. During the 2015-2016 school year, Watson the Whale traveled more than 8,000 miles and taught more than 9,500 students about how trash affects migrating marine species.