LoCO reader Lilykoi Leilani sent along some photos of “this crazy fish” she found washed up on Mad River Beach Thursday ...

The sex life of hermaphroditic animals is determined by one fundamental question: Who assumes the female role and produces the costly eggs? Hamlets avoid this dilemma by engaging in reciprocal egg ...

Gender bending Changing sex might come naturally to the sharpnose sandperch, but a personality makeover is another matter. An international study published in Ecology Letters shows while the ...

GAINESVILLE, Fla., June 9 (UPI) --Chalk bass are more committed to their spouse than their gender. A new study shows the monogamous hermaphrodite fish switch genders up to 20 times a day. The sexual ...

Strong leaping skills help a bizarre hermaphrodite fish live out of water for weeks at a time, new research shows. Subscribe to read this story ad-free Get unlimited access to ad-free articles and ...

We tend to think of water treatment safety in terms of potential harm to people. But CU-Boulder professor David Norris is also concerned about humans’ impact on fish — specifically the way chemicals ...

Hermaphrodite fish are on the rise, thanks to the birth control pill and other natural and unnatural forms of estrogen that have made their way into the water. Feminized fish were first found ...

The hamlet fish can be both the father and mother of its offspring – a characteristic that is helping researchers to understand why genes often undergo recombination more readily in one sex. During ...

The widely used herbicide atrazine can convert male frogs into hermaphrodites (SN: 11/02/02, p. 275: More Frog Trouble: Herbicides may emasculate wild males). But what happens when a naturally ...