Is Nemo A Boy Or A Girl? Did you know that Nemo's gender isn't set in stone? Clownfish, like our beloved Nemo, have a fascinating ability to change their sex. In a group of these colorful swimmers, one clownfish rises to the top, becoming the dominant female. But here's the twist: if the leading lady is removed, the dominant male steps up, transforming into a female, while another fish takes on the dominant male role. This gender-bending phenomenon is more common in the aquatic world than you mi