BIOSPHOTO/Alamy: A male sailfin Tetra (Crenuchus Spilurus). BIOSPHOTO/AlamyOne species of Amazonian fish has developed a simple method to seize mating opportunities from dominant males. They hide while the dominant males in a species of Amazonian fish work hard to convince a female to lay eggs. Then they steal the female's attention and come forward.Male sailfin tetras (Crenuchus Spilurus) of lower rank spend a lot time courting females. With their colorful fins extended, they may spend many days circling aquatic plants.Tiago da Silva Pires in the National Institute for
