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 ...

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 ...

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 ...

Off the western coast of Australia, ocean giants showed off a rarely seen behavior, researchers said. Matt Hardy via Unsplash With bodies that can grow longer than school buses, it may come as a ...