A 400-million-year-old jawed fish fossil found in the Arctic, Romundina gagnieri, could be a key link in the evolution of ...

Studies reveal fish don’t just react by reflex. Their nervous systems prioritize pain, triggering stress and trauma that can last minutes.

Researchers recorded more than 1,000 fish sounds in Barkley Sound, an inslet on the coast of Vancouver Island in British ...

Have you ever wished you could swim like a fish? How about speak like one? In a paper recently published in the Journal of ...

Invasive Asian carp have spread around the United States. Wildlife experts and engineers fight to keep them out of the Great ...

Fish are one of the species in the world with the most diversity. These aquatic animals come in different shapes, colors, and skeletal compositions. Some are endemic to freshwater habitats, and others ...

In the past, many scientists believed that only mammals and birds could feel or think in complex ways. Reptiles, fish, and insects were seen as simple creatures that reacted purely on instinct. But ...

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, ...

Tuna, opah, and billfishes such as marlins and swordfish are among the 0.1% of fish species that are warm-blooded. Evidence by an international team of researchers led by UC San Diego’s Scripps ...