A small fossil reveals that the largest freshwater fish, Otophysans, emerged in the sea, not in rivers, changing the ...

Octopuses have often been thought to prowl the seafloor solo using camouflage. But a new study suggests that some have surprisingly rich social lives. A new study found that some members of an octopus ...

An Octopus cyanea hunts with a blacktip grouper on one side and a blue goatfish on the other. Octopuses don’t always hunt alone — but their partners aren’t who you’d expect. A new study shows that ...

A new study shows that cichlid fish reared in larger social groups from birth display a greater and more extensive range of social interactions, which continues into the later life of the fish.

It would be a game-changer if all members of a basketball team could see out of each other's eyes in addition to their own. Biologists have found evidence that this kind of collective sensing occurs ...

A coalition of southeast Michigan environmental groups uncovered something troubling when they analyzed the bodies of more than 60 fish caught by anglers casting on the Huron and Rouge rivers. Every ...

Conservation advocates are seeking improved fish mobility features for the Felt Dam — or removal of the dam altogether — for ...

A single serving of freshwater fish per year may be the same as drinking water laced with toxic, so-called "forever chemicals" for a month, according to a study conducted by a Washington D.C.-based ...

Many fish species evolved parts of their fins into sharp, spiny, needle-like elements -- called fin spines -- that function to protect the fish against predators. Such spines have evolved ...