Fish

Find out everything there is to know about fish and stay updated on the latest news with the comprehensive articles, interactive features and fish pictures at LiveScience.com. Learn more about these fascinating creatures as scientists continue to make amazing discoveries about fish.

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A 16-foot-long (4.9 meters) female sawfish washed ashore in the Florida Keys last week.

Largest recorded smalltooth sawfish washes up dead in Florida

By Stephanie Pappas

The longest sawfish ever measured washed up in Florida, not far from another large specimen.

The arapaima, one of the world's largest freshwater fish, is native to the Amazon River.

Amazon 'river monster' turns up dead in Florida

By Laura Geggel

A dead "river monster" from the Amazon was discovered in Florida, leading to concerns that the fish might become an invasive species there.

A juvenile shortfin mako shark with a stab wound in his head washed ashore in Los Cabos, Mexico.

Shark gets stabbed in the head, washes ashore in Los Cabos

By Laura Geggel

Dead sharks usually sink, so it's surprising to find one washed up onshore.

Seaside sparrow nests that are close to the ground are prone to flooding. But in nests that are higher up, chicks may be vulnerable to terrestrial predators.

Video captures unusual death of baby bird drowned by a fish

By Mindy Weisberger

Scientists recently captured video documenting the first reported instance of a fish preying on a newly-hatched baby bird, in a flooded nest in coastal Georgia.

The Australasian flying fish, Cheilopogon pinnatibarbatus melanocercus, gliding over the water.

Flying fish: Real fish, but not really flying

By Sarah Wild

Key facts and information about flying fish.

A birthday celebration helped sad grouper Mikko turn that frown upside down.

Famous fish that ate all his friends gets cheered up by 16th birthday party

By Mindy Weisberger

Happy 16th birthday to Mikko the grouper, a popular aquarium fish in Finland who missed his human visitors during the COVID-19 shutdown.

A tongue-eating louse, or isopod (purple) became this fish's living tongue.

Meet the 'vampire' parasite that masquerades as a living tongue

By Mindy Weisberger

Digital models of a fish skull revealed a parasitic stowaway inside its mouth: a "tongue biter" isopod that consumed and then replaced the fish's tongue.

Tiny larval sunfish look nothing like the adults.

Adorable, bug-size sunfish babies grow up to be giant 'swimming heads'

By Mindy Weisberger

Scientists have identified the larvae of one of the world's biggest fishes — the bump-head sunfish (Mola alexandrini) — and the youngster is ridiculously tiny.

The sturddlefish has a mix of genes from the Russian sturgeon and the American paddlefish.

Scientists accidentally create 'impossible' hybrid fish

By Stephanie Pappas

Hungarian scientists accidentally created a hybrid of a Russian sturgeon and an American paddlefish, leading to a long-nosed "sturddlefish" baby.

The red handfish, a cousin of the now-extinct smooth handfish.

RIP, smooth handfish. You were weird, and now you’re extinct.

By Laura Geggel

This extinct fish used its hand-like fins to "walk" on the ocean floor.

Ophichthidae is a family of sinuous fishes that are also known as snake eels. The species pictured here, Aprognathodon platyventris, is found in the western Atlantic Ocean.

Snake eels stage stomach-bursting escape after being eaten (and then things get really nasty)

By Mindy Weisberger

After snake eels are swallowed by bigger fish, they can burst out of their predators' stomachs ... to freedom? Not exactly.

A painting of the 45-million-year-old saber-toothed anchovy Monosmilus chureloides chasing a shoal of smaller anchovies … until the early whale Dalanistes snaps it up.

Ancient 'shapeshifting vampire demon' anchovy had saber tooth and fangs

By Laura Geggel

An anchovy cousin had fang-like teeth on the bottom jaw and one giant saber tooth on the top.

Rare pink manta ray caught courting lady friend Down Under

By Laura Geggel

Photos of a bright pink manta ray have gone viral after the Pepto-Bismol-colored creature was spotted swimming near Australia’s Great Barrier Reef.

Lamprologus lethops, a fish that lives in the lower Congo River, is pale and blind like fish that dwell in caves deep underwater.

Dying Fish Revealed Congo Is World's Deepest River

By Mindy Weisberger

The turbulent lower Congo River, home to hundreds of fish species, is not only Earth's deepest river; it also presents biologists with an intriguing window into evolution.