Swim bladder disease is a very common health condition that affects many types of fish. In short, it makes it difficult for ...

A video about a 23-year-old goldfish struggling to swim has gone viral on TikTok, where it had received 5.5 million views at the time of writing. In a clip shared by TikToker Aidan Cramer ...

A tiny fossil, Acronichthys maccognoi, rewrites fish evolution in North America and reveals how otophysans conquered freshwater habitats.

Hydrogels, which are soft materials formed by crosslinking polymers, could have a variety of medical applications. In research published in Advanced Science, investigators developed an injectable ...

When saltwater fish long ago evolved to live in fresh water, many of them also evolved a more sophisticated hearing system, ...

An curved arrow pointing right. Fish maw — the swim bladder of a fish — is one of the most expensive dried-seafood products in the world. A Chinese delicacy, it can fetch $450 to $1,000 per kilogram.