Fish features, news and articles

A new species of piranha-like fish called pacu was recently found hiding in plain sight among several near-identical species in the Amazon River. Researchers have named it after Sauron from "The Lord of the Rings."

A rare giant hoodwinker sunfish that washed ashore Gearhart beach in Oregon could be the largest of its species ever sampled.

People had linked recent shark attacks in the Florida panhandle to orca activity in the Gulf. But a combination of dry weather and heat was the real driving force.

Despite numerous tests, experts still can't figure out why smalltooth sawfish in Florida are dying in such a strange way — spinning, thrashing and beaching themselves.

A female Pacific footballfish was found dead on an Oregon beach — potentially for the first time ever. It is currently unclear what killed the alien-looking creature and how it was dragged up from the depths.

"Exceptionally preserved" fossils of an ancient shark that lived alongside the dinosaurs has finally revealed what the predator looked like — and why it may have gone extinct.

Anglerfish first colonized the ocean's midnight zone 55 million years ago, during a period of extreme global warming, a new study finds. The bizarre fish adapted to thrive in the deep sea by becoming sexual parasites, the researchers said.

Filmmakers have captured hundreds of hammerhead sharks circling a volcanic island off Costa Rica for a new Netflix wildlife series.

Juvenile bull shark numbers have significantly increased in Mobile Bay, Alabama, as waters warm — but swimmers don't need to worry, researchers say.

Erratically thrashing and whirling smalltooth sawfish are stranding on beaches — and scientists don't know why they're behaving this way.