So these little fish are more amazing than I ever knew. They live amongst anemone tentacles protected by a layer of mucous that covers their body. This symbiotic relationship means that clownfish are protected from predators, and get left over scraps of food from the anemone. In exchange the clownfish drive off intruders and keep the anemone clean of parasites. Interestingly all clownfish are born male, but the largest clownfish in a group is female. If she dies, her mate increases in size and transforms into a female and subsequently mates with the next largest male. It is thought that because adult clownfish rarely stray from their homes, this evolutionary trait ensures that there is always a female and a male in the small group.
For my other post on clownfish Click here.