While a dominant male fish from northern Mexico mates with a female, a small fella bides his time in the offing. Suddenly, the little guy darts in ahead of Mr. Big and plants his seeds on freshly laid ...

Fish appear to spank their children—and it makes their kids more cooperative in their duties, new research has found. These findings imply that this fish may have more advanced and complex social ...

A new study has found that chemical additives in everyday plastic might be stopping – or, at best, interrupting – the reproductive habits of a shrimp-like species that is key to the marine food chain.

University of Otago—Ōtākou Whakaihu Waka scientists have discovered that it takes mere minutes for a species of sex-changing fish to develop dominant behavior after a change in the pecking order. In a ...

Hoeven’s wrasse (Halichoeres melanurus) is one of many species of reef fish that begin adult life as females and later switch to being functionally male. UC Davis researchers have shown that ...