3 Foolproof Ways to Tell if a Guppy is Male or Female
Identifying Physical Differences Anal Fin Shape The anal fin is located on the underside of the fish, just behind the belly. In male guppies, the anal fin is modified into a long, pointed structure called a gonopodium. The gonopodium is used to transfer sperm to the female during breeding. In female guppies, the anal fin … Read more
