While it’s a known fact that female guppies prefer orange and unusual patterns on their male partners, the team found that ...

Earth’s waters are filled with billions of fish, coming in all manner of glorious colors, shapes, and sizes – but which is ...

Male bettas are nicknamed Siamese fighting fish for a reason: They're very aggressive with one another and with female bettas. They are violent enough to lower their expected lifespans.

Betta-fish breeders long ago might have ended up selecting for dmrt1 precisely because they wanted more predictable ratios of male to female bettas.

When the top spotty fish in a tank disappears, the runner-up turns aggressive within minutes, rushing and nipping rivals ...

Researchers in Colorado have made a startling discovery. Fish, apparently male, are developing female sexual organs. Scientists believe it's the result of too much estrogen in the water and they ...

Scientists have found that female zebrafish can filter the semen of their mates to only allow the best sperm to fertilize their eggs.

In short, he plans to produce batches of male carp that would destroy the eggs of female carp during spawning season. The modified male fish would spray the eggs as if fertilizing them.

All the latest science news on male fish from Phys.org. Find the latest news, advancements, and breakthroughs.

Asian carp - which include bighead carp, silver carp, black carp and grass carp - were originally brought into this country by fish farmers in the South in the 1970s to clean up algae in their ponds.

Male sharks grow faster than females, but females ultimately get much, much larger than their male counterparts. Female whale sharks can reach a maximum size of around 46 feet in length.

The Oklahoma Department of Wildlife Conservation says a fishing guide service recently caught a 67-pound male bighead carp in the Grand Lake area.