Cocaine Sharks Are Back in the Bahamas and This Time Scientists Know Who Did It

April 4, 2026 Cat2, The Media
Ramon Carretero via shutterstock

Bahamas sharks are testing positive for cocaine – and researchers are pointing the finger at the tourists.

Now a new study has the receipts.

Scientists just confirmed what nobody wanted to admit about one of America's favorite vacation destinations.

The Cocaine Sharks Bahamas Study and What It Found

A team of scientists from Brazil and Chile tested the blood of 85 sharks off the coast of Eleuthera Island in the Bahamas.

Twenty-eight came back dirty.

The study – titled "Drugs in Paradise" and published in the journal Environmental Pollution – detected cocaine, caffeine, and the over-the-counter painkillers acetaminophen and diclofenac in Caribbean reef sharks, Atlantic nurse sharks, and lemon sharks.

Researchers didn't bury the lead: "To the best of our knowledge, this is the first report of caffeine and acetaminophen detected in any shark species worldwide, and the first report of diclofenac and cocaine in sharks from The Bahamas, an environment commonly described as pristine."

The sharks that tested positive showed altered triglyceride, urea, and lactate levels – stress and metabolism markers that tell researchers something inside these animals is changing, though the long-term effects remain poorly understood.

The Researcher Who Blamed the Tourists

Lead researcher Natascha Wosnick, a biologist at Brazil's Federal University of Paraná, didn't mince words when asked how the drugs got there.

"It's mostly because people are going there, peeing in the water and dumping their sewage in the water," she told Science News.

Eleuthera isn't Cancun.

It's one of the Bahamas' most remote islands – exactly the kind of place tourists seek out to feel like they've found something untouched.

But 12.5 million people visited the Bahamas in 2025 alone, according to the Bahamas Ministry of Tourism, Investments and Aviation.

That's 12.5 million people bringing their prescriptions, their coffee habits, their party supplies – and their wastewater.

The study found that the surge in tourist traffic and vacation-home development was driving a more complex chemical load into coastal waters than the ecosystem was built to handle.

And sharks help it along – Wosnick noted they "bite things to investigate and end up exposed."

Cocaine Sharks Were Found in Brazil First and the Numbers Were Worse

This isn't the first time researchers pulled a positive from a shark.

In 2024, scientists tested 13 Brazilian sharpnose sharks caught off Rio de Janeiro.

Every single one tested positive for cocaine.

Cocaine levels in those sharks ran three times higher than benzoylecgonine – the metabolite your body produces when it processes the drug.

That ratio told researchers something important: much of the cocaine didn't enter the water through human metabolism at all.

It went in directly.

One confirmed cocaine detection in the Bahamas study – a baby lemon shark found in a nursery creek – appears to be a case of exactly that.

Wosnick had seen cocaine packages near that creek before.

The shark bit into one.

Traffickers operating Caribbean and South American routes routinely jettison cargo when intercepted – those bales sink, leak, and enter the food chain.

Sharks sit at the top of that chain, which means toxins accumulate in their bodies over time through a process called biomagnification.

It's the same reason pregnant women are warned about eating too much tuna.

If cocaine is moving up the food chain in sharks, the next question is how much further it goes.

Why Trump's Drug War on the Water Matters Here

Here's what nobody else is connecting.

The Trump administration launched Operation Pacific Viper in August 2025 – a counter-drug operation targeting the Eastern Pacific and Caribbean Sea.

In fiscal year 2025, the U.S. Coast Guard seized 510,000 pounds of cocaine – a 200% increase over the annual average.

In the first six months of Operation Pacific Viper alone, the Coast Guard pulled more than 200,000 pounds out of the water – more than the agency typically seizes in an entire year.

Every bale the Coast Guard intercepts is one fewer bale that ends up at the bottom of the ocean near Eleuthera Island, leaking into the water column, working its way into a baby lemon shark.

Trump is fighting this battle on two fronts simultaneously – keeping drugs off American streets and, it turns out, out of American vacation waters.

Clean oceans and secure borders aren't separate issues.

They're the same issue.

Sources:

  • Ashley J. DiMella, "Sharks in Bahamas found to have cocaine and other drugs in their systems, study says," Fox News, March 31, 2026.
  • "Drugs in paradise: caffeine, cocaine, and painkillers detected in sharks from The Bahamas," Environmental Pollution, February 20, 2026.
  • "Sharks in the Bahamas test positive for caffeine, painkillers and even cocaine, researchers find," CBS News, March 27, 2026.
  • "Cocaine Sharks in the Bahamas Show the Cost of Bad Choices," PJ Media, March 26, 2026.
  • "Coast Guard Sets Historic Drug Seizure Record in 2025," Coast Guard Foundation, November 6, 2025.
  • "Coast Guard Seizes 200,000 Pounds of Cocaine in Six Months in Pacific Ocean," Military.com, February 5, 2026.