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This Freshwater Fish Can Live Over 120 Years and Shows No Signs of Aging. But It Has a Problem

An ancient freshwater species may be quietly facing a silent collapse.

Nearly all fish in the US are still contaminated by mercury. Here's what you need to know

Researchers have been sounding the alarm for years, but the US still has a big mercury pollution problem.

Octopuses hunt with fish and punch them when they don't contribute

Octopuses are getting more and more interesting with each new study.

Meet Dunkleosteus, the prehistoric predator that ruled the seas 358 million years ago

Dunkleosteus looked like a brute, and it probably was one. It thrived during the Devonian Period (also known as the “Age of Fishes”), millions of years before the first dinosaur. This fearsome fish weighing over a ton was among the largest and most formidable animals of its time, earning its place as one of Earth’s […]

The Trumpetfish is a master of disguise: it hides behind other, bigger fish to hunt

These fish hide everywhere. There could be one behind you right now.

Surströmming: the infamous Swedish fermented fish that's putridly fascinating

Surströmming is definitely one of the most putrid foods conjured by humans. But it's fascinating in its way.

“Ugly” reef fish are more endangered than “pretty” ones and it's a problem

Humans are shaping nature based on their own preference -- and this preference is sometimes very unhealthy.

Large ocean fish need 'Blue Corridors' to thrive -- we now know where these should be established

Setting-up areas where these fish can migrate in peace would help these species remain healthy.

Coral bleaching is draining reef fishes of their bright colors

Sometimes, natural selection makes us duller.

LED-equipped fishing nets help protect wildlife from unintentional captures

The fish we want to capture aren't turned away by the lights.

Major aquarium vendor to stop selling fish bowls -- they drive fish mad

A leading French aquarium vendor will no longer produce and sell fish bowls due to concerns about animal welfare.

Extinct species of fish reintroduced into its native habitat in Mexico

Locals and international organizations worked together to make it happen.

Some fish start Mexican waves to keep themselves safe from predators

It pays to work together!

Fish like to rub on sharks, strangely enough, and use them as exfoliating soaps

Is this the ultimate thrill-seeking, or just a very dangerous spa treatment?

Climate change is choking the oxygen out of deep water, and it's putting fish in a double bind

It's not a good time to be a fish.

Some fish are warm-blooded -- and it lets them swim faster

However, it also leaves them more vulnerable to climate change.

Fossil Friday: private collector wanted a dinosaur skull, but got a huge, fossilized bony fish lung

Haven't we all fallen for this at one point in our lives?

Fish have been eating plastic since the 1950s. And it's getting worse

The consequences of our reliance on plastics

The sheepshead fish: fish will give you dental nightmares

The amazing sheepshead fish has human-like teeth.

Fish motions could help us identify their personalities

We should try it on Nemo.

Living fossil fish has 62 copies of a "parasite gene" humans share too -- we have no idea how they got there

Sharing is caring?

Algae-farming fish domesticate shrimp to improve their farms

It's the first example of a non-human vertebrate domesticating another animal.

Let more big fish sink -- it can help tackle climate change

Ocean fishing releases a lot of CO2 that would otherwise be locked on the sea floor.

Climate change is destabilizing marine food webs

There will likely be no Nemo to find in the future.

This parasite can eat the tongue of a fish and then take its place

Better watch out if you are a fish or you could lose your tongue

Migratory freshwater fish declined 76% since 1970

They are very important to keep rivers, lakes and wetlands healthy

Eating fish may protect the brain from air pollution and white matter shrinkage

Omega-3 fatty acids have been associated with less brain shrinkage at old age.

Fossil Friday: ancient squid caught in stone while munching on a fish

Fossilized behaviors are extremely rare finds.

A new model developed to estimate how ocean acidity evolves over time

"Ocean acidification is proceeding at a rate 10 times faster today than any time in the last 55 million years," the team explains.

Predators can change their prey's brains

Somewhere in Trinidad, killifish are growing more brain cells to avoid predators.

Climate change is destroying jobs in New England's fisheries

"As we see more warm winters off the New England coast, fewer fishermen stay in business," the authors say.

3D-printed coral can help save reefs and the fish that live there

When life takes your corals away, print more.

Fish harvesting causes rapid evolution, according to genetic data

Overfishing is causing fish stocks to evolve rapidly.

Fossil Friday: researchers discover new, ancient relative of the tilapia

Do you think it was tasty, too?

Fish-like robot is animated by fake 'blood'

It's scary how lifelike this robot is.

These fishes get sad when their partner is away -- pointing to the roots of romantic love

Hear that? That's the sound of an itsy-bitsy fishy heart breaking apart and it's tragic.

Eating bad PUFAs may put you at risk of developing asthma -- but fish contains the good PUFAs

I'm thrilled that PUFAs is an actual scientific term.

Warming oceans are depleting global fish stocks

As if overfishing wasn't enough, fisheries are plummeting because of the effects of higher water temperature as a result of global warming.

A 'virgin' fish named Mary got pregnant without having sex

Could we be witnessing an evolutionary leap in action?

Ancient haute cuisine -- Mesolithic people had caviar feast

It was a fishy affair.

Researchers find Jurassic piranha-like flesh-eating fish, and also spot their victims

The Jurassic had flesh-eating fish... of course it did.

Small Somalian cavefish hints at mammals' nocturnal ancestor

Things start to change when you've been living in the dark for millions of years.

Tiny fish passes mirror test, might be self-aware

Not only would it be exciting to see self-awareness develop on the fish's restrained 'hardware', but also to understand what that difference means in terms of how the fish experience self-awareness.

Roman fish salting workshops reveal two whale species lost from the Mediterranean

The discovery stands to change our understanding of the Roman fishing industry and the history of two endangered whale species.

Hawaii moves to ban common sunscreen mixes in a bid to safeguard its corals

Worry not -- alternatives are readily available, so don't cancel your vay-cay just yet.

Cyprian dolphins resort to chewing through fishing nets due to overfishing

We're not giving them any other option.

Fish-like robot might reveal the secret life of ocean wildlife

Aquatic bots like SoFi will enable scientists to learn more about some of the most elusive underwater creatures.

10 of the Weirdest Prehistoric Creatures

Eons ago, many millennia before written history, bizarre animals roamed the Earth.

NASA algorithm and citizen scientists allow biologists to track whale sharks

The research could help us better understand and protect these gentle giants.

Do fish have feelings? Science suggests so

Not only do fish have feelings, but this ability might have evolved hundreds of millions of years ago.