Species numbers alone do not fully capture how ecosystems are changing. In a global study, scientists analyzed long-term data ...

A strange, big-eyed "dragonfish" hidden under Antarctic ice for 780,000 years has finally been discovered - and it's already at risk.

Learn how cleaner wrasse used a mirror and even dropped food to test their reflections, a behavior linked mostly to mammals.

Two species of small, deep-dwelling fish called pearlsides possess eye cells that break the rules of vertebrate vision, combining features of rods and cones into a single hybrid photoreceptor never ...

Body shape had a clear influence on energetic demand. Deep-bodied fish, with their larger surface area, generate more resistance as water moves around them, making them naturally better at resisting ...

Researchers at Osaka Metropolitan University in Japan have discovered a previously undiscovered behavior in cleaner wrasse ...

With each passing year, species across the United States face an uncertain future. As habitats continue to be destroyed, climate change destabilizes weather patterns, and invasive species take over ...

Can we finally retire the myth that goldfish have three-second memories? This oft-cited “fact” has been thoroughly debunked. Scientists have shown that fish can distinguish and remember individuals, ...

MISSOURI, USA — A three-foot-long fish that can live on land can wreak havoc on Missouri's native fish population, which is why the Missouri Department of Conservation urges any anglers who catch the ...