(CN) – Hundreds of species of fish are able to completely reverse their sex several times during their lives, and researchers in New Zealand said in a study published Wednesday they have finally ...

In a bizarre twist of evolution, some fish have been found to be able to control which sperm fertilizes their eggs in order to have the best offspring. According to a study published in the journal ...

Remove the top male spotty fish and, within minutes, the next-in-line female morphs into the tank s new tyrant charging and nipping rivals while her body quietly begins a weeks-long transition to male ...

For a tropical fish called the bluehead wrasse, sex isn’t always permanent. When a group of the fish loses its dominant male, the biggest female rapidly changes sex, taking on distinctive male ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. For any animal, releasing sperm cells requires a bit of time and ...

Most of the walleyes Wisconsin fisheries biologists are netting in some northern lakes, and 80% of those tested last fall from two state hatcheries, are turning up females, and the experts don’t know ...

Discovered: Male fish who engage in same-sex flirting lure in female fish; cheese dates back 7.5 millennia; Americans love public transportation once they give it a chance; depressed mice cheer up ...