What Does a Sea Lion Have to Do With Your Kitchen Trash?

If you've ever visited Pier 39 in San Francisco, you've probably seen them.

The California sea lions lounging on the docks, barking at one another, slipping into the water, and occasionally competing for the best spot in the sun. They're hard to miss, and even harder not to stop and watch.

They're also one of those things that makes living in the Bay Area pretty special.

But there's another side to the story.

The same San Francisco Bay that gives these animals a place to rest and feed is also connected to a much bigger problem: marine debris. And some of that debris can be traced back to something surprisingly close to home.

Our streets.
Our neighborhoods.
Our storm drains.
Our everyday choices.

In other words, the ocean is downstream from all of us.

The sea lion at Pier 39

In 2023, The Marine Mammal Center responded to a California sea lion at Pier 39 that had been entangled in ocean trash.

The young male, later named Pinger, had first been spotted in San Francisco in 2021 with something wrapped around his neck. Over time, the wounds became increasingly severe. Eventually, rescuers launched a specialized operation to safely capture and treat him. After veterinary care, Pinger was released back into the wild.

It's a remarkable rescue story, but there's an uncomfortable question underneath it:

How did trash end up around a sea lion's neck in the first place?

Marine debris can include fishing gear, plastic bags, food packaging, bottle caps, rope, straps and countless other items that find their way into waterways and eventually the ocean.

And once that trash enters the water, it doesn't simply disappear.

It can float. It can sink. It can travel. It can break into smaller pieces. And it can become a hazard for the animals that live there.

The California Coastal Commission defines marine debris as persistent solid material that is intentionally or unintentionally discarded or abandoned in the marine environment. It can originate far from the coast and travel significant distances before reaching the ocean.

That's where this story gets interesting.

Because the trash doesn't have to start at the beach.

The ocean starts farther inland than you think

Imagine a plastic wrapper blowing out of a trash can on a windy day.

Or a bottle cap left behind in a park.

Or a piece of packaging that falls out of a shopping bag.

Or a disposable item that gets washed into a street gutter during a rainstorm.

Eventually, that piece of litter can enter a storm drain.

From there, it may travel into a creek or stream, then a river, then a bay, and eventually the ocean.

Street → storm drain → creek → bay → ocean.

The California Coastal Commission estimates that about 80% of trash found at beaches and entering the Pacific Ocean originates on land. It can be carried by wind or water through storm drains, creeks and rivers before reaching the coast.

That means you don't have to live near the beach to have an impact on ocean pollution. You don't even have to visit the ocean. If you live in a watershed, you're connected to it. And that's all of us.

This is why marine debris is everyone's problem

When we think about ocean pollution, it's easy to picture an enormous garbage patch floating somewhere in the Pacific.

That's certainly part of the problem, but marine debris can be much more immediate. It can be the cigarette butt dropped on a sidewalk. The food wrapper left behind at a park. The plastic bag caught in a fence. The fishing line abandoned at a marina. The bottle that rolls into a gutter. The tiny piece of plastic that gets swept away by the next storm.

The California Coastal Commission has been collecting data through Coastal Cleanup Day for decades, and the results help show what types of debris are ending up in our waterways and along our coast.

Some of the most commonly collected items include food wrappers and containers, bottle caps and lids, plastic bags, disposable food-service items, straws and stirrers, and beverage containers.

None of those things looks particularly dramatic on its own. And that's part of the problem.

One wrapper doesn't look like an ocean pollution crisis.

One bottle cap doesn't look like a threat to wildlife.

One plastic strap doesn't look like something that could end up around a sea lion's neck.

But multiply one piece by thousands. Then millions. Suddenly, the picture changes.

It's not just sea lions

California sea lions aren't the only animals affected by marine debris. Wildlife can become entangled in discarded fishing line, rope, nets, plastic bands and other materials. Animals can also ingest pieces of debris, mistaking them for food. Marine debris can injure or kill wildlife, damage habitats and create risks for people as well.

And there's another problem we don't always see.

Plastic doesn't necessarily remain a recognizable piece of plastic forever. Sunlight, waves and weather can break larger pieces into smaller fragments and eventually microplastics. Those tiny particles can move through marine ecosystems in ways that are much harder to see and understand.

So, when we talk about keeping plastic out of the ocean, we're not just talking about keeping beaches looking nice. We're talking about protecting an entire ecosystem.

But here's the good news: we can stop trash before it gets there

This is where we think the conversation about sustainability needs to change. Sometimes environmental problems feel so enormous that the easiest response is to feel overwhelmed.

What's one person supposed to do about ocean pollution?

You can't clean up the Pacific Ocean yourself.

You can't control every piece of litter in your city.

You can't prevent every storm from carrying debris into a waterway.

But you can do something much more practical:

Keep waste out of the system in the first place.

Every time we choose a reusable item instead of a disposable one, we reduce the amount of waste that needs to be managed. Every time we refill instead of replace, we prevent another container from entering the waste stream. Every time we repair, reuse or repurpose something, we extend its useful life. And every time we pick up a piece of litter, we're removing one more potential piece of marine debris from the environment.

This is why small changes matter.

Not because one reusable towel is going to save the ocean. But because millions of small decisions can change how much waste we create in the first place.

Start with the things you use every day

You don't have to completely overhaul your life to make a difference. Start by looking at the disposable things you use over and over again.

Paper towels.

Makeup remover pads.

Plastic toothbrushes.

Single-use cleaning bottles.

Disposable food-storage items.

Plastic bags.

These are interesting because they're not one-time purchases in the way a piece of furniture or an appliance might be. They're repeated habits. And repeated habits are where small changes can add up.

For example, replacing disposable makeup remover pads with reusable ones means you're changing something that might otherwise become part of your weekly trash. Using reusable kitchen towels instead of reaching for a new paper towel every time you wipe the counter changes another repeated habit. Choosing refillable or package-free products can eliminate packaging from your routine altogether.

None of these choices is perfect. And that's not the point. The point is to find the changes that actually work for your life and make them stick.

Sustainable living isn't about never creating waste. It's about creating less of it, one habit at a time.

And then there's the cleanup itself

Even when we do everything we can to reduce waste, litter is still going to exist. That's why community cleanups matter.

California Coastal Cleanup Day is the state's largest annual volunteer event, bringing people together to clean beaches, creeks, rivers, lakes, shorelines and other waterways. And there's an important reason cleanups happen in places that aren't directly on the coast. Virtually every body of water in California ultimately flows toward the ocean. Trash collected in a neighborhood, park, creek or river may be trash that never gets the chance to become marine debris.

That's a pretty powerful idea.

You don't have to be standing on a beach to help protect the ocean.

Coastal Cleanup Day is more than picking up trash

This year's California Coastal Cleanup Day takes place on Saturday, September 19, 2026, from 9 AM to noon. It's the 42nd annual event, with cleanup sites throughout California. We’ll be volunteering again this year, and we’re looking forward to getting out there again.

The Coastal Commission encourages volunteers to bring reusable cleanup supplies when possible, such as buckets and gardening gloves. Participants can also record what they find using the CleanSwell app or a paper data card.

And that data is important. Every bottle cap, food wrapper, cigarette butt, plastic bag and other piece of debris that gets counted contributes to a much larger picture of the waste entering our waterways.

In other words, volunteers aren't simply picking up trash. They're participating in a statewide community science effort that helps us understand the problem and work toward preventing it. That's one of the reasons we love the idea of Coastal Cleanup Day.

It turns a problem that can feel enormous into something tangible. You show up. You put on a pair of gloves. You pick something up. You count it. And for a few hours, you become part of something much bigger than yourself.

So, what does a sea lion have to do with your kitchen trash?

Maybe more than you thought.

The sea lions at Pier 39 live in an ecosystem that is connected to our neighborhoods, our streets, our businesses, our parks and our homes. The waste we create doesn't always stay where we leave it. Sometimes it travels. And sometimes it ends up somewhere we never intended it to go.

That doesn't mean we should feel guilty every time we throw something in the trash. It means we should start thinking about the full journey of the things we use.

Where did it come from?

How long will I use it?

What happens when I'm finished with it?

Is there a reusable alternative?

Can I avoid it altogether?

Those questions may seem small. But so is one piece of litter. Until there are thousands of them.

This September, let's think upstream

If you're able to participate in California Coastal Cleanup Day on September 19, find a cleanup site near you and join in.

You can clean a beach, but you can also help clean a creek, river, park or neighborhood. The California Coastal Commission has a statewide map of participating locations and information about how to register.

And if you can't participate that day, that's okay too. Pick up litter during your next walk. Bring a reusable bag when you shop. Replace one disposable product you use regularly. Refill instead of replace. Reuse what you already have. And pay attention to the things you throw away.

Because protecting the ocean doesn't always start at the ocean.

Sometimes it starts in the kitchen.

And somewhere downstream, there's a sea lion that benefits from every piece of trash that never makes it there.

Photo by David Vives on Pexels.