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 ...