Scientists reveal Priocharax rex, a tiny Amazonian fish with a strange skin “wing” that redefines evolution in miniature.

Female fish can breed a new species if they aren't choosy about who is Mr. Right. Fish will mate with a species outside their own if the male's coloring is attractive enough or if the female can't see ...

Adding colorful tropical fish to your aquarium is a no-brainer if you love being mesmerized by beautiful colors and patterns. Many people, when they hear the word ‘fish’ think of dull grey fish or the ...

The brook trout, the only species of native trout in Connecticut, will soon be afforded greater protections under state ...

The escape of thousands of salmon from an open-pen fish farm has endangered the wild salmon population in Iceland. If the escaped fish breeds with the native species, it could irreparably damage ...

By Kaia Glickman Fish were discovered to make sounds more than 2,000 years ago, but they have gone largely unheard by humans.

A study reveals how seabream change sex and why some males invest more sperm, rewriting the hidden biology of these fish.

Internal clocks can tick very differently. While some people are most productive in the morning, others are only active later in the day or at night. This phenomenon is known in science and medicine ...

To keep your fish healthy and happy throughout their life, you need to understand the needs of fish in general. There are thousands of fish breeds, and each one requires different care and feeding. It ...

Fish will mate with a species outside their own if the male's colouring is attractive enough or if the female can't see him properly, according to new research. Such 'mistakes' in mate choice can lead ...