For decades, ecologists have known that how a species looks or eats affects its environment. But a new study by researchers at the University of California, Santa Cruz, shows that social behavior ...

Western mosquitofish, pictured here, are known as the "plague minnow" due to their aggressive impact on native habitats when introduced. For decades, ecologists have known that how a species looks or ...

A new study reveals that behavioral isolation between populations of Bahamas mosquitofish is driven primarily by the actions of females—not just through mating choice behaviors, but also through ...

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 ...

A massive species of endangered shark might be kinkier than we first thought, scientists have found. In rare video footage, a male whale shark has been spotted biting at his female partner during ...

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 ...