7Animals That Can Change Gender - Page 3 of 9

Banana slugs

It’s bright yellow. It can grow up to 10 inches long. Of course it’s name is Banana Slug! These wormlike mollusks are what is called “simultaneous hermaphrodites” which means that unlike Clownfish, they display both male and female traits at the same time. Although they are capable of self-fertilization, most banana slugs usually mate with a partner. When they mate, they both produce sperm and eggs. At the end of their mating, they both have fertilized eggs that they usually deposit under leaves or logs. One mating process – double the offspring!