Swordtails are well-known beginner-friendly, community fish species, compatible with various other fish and environments. They have been bred for many generations, resulting in many different ...

Are you thinking of keeping fish as pets but don’t know where to start? Take a look at two of the most popular choices for beginners - Guppy fish and Swordtail fish. Here are the reasons why these ...

Behavioral Ecology and Sociobiology, Vol. 59, No. 1 (Nov., 2005), pp. 51-57 (7 pages) Males of the swordtail fish Xiphophorus cortezi are polymorphic for the pigment pattern vertical bars. Previous ...