Bluehead Wrasse (Thalassoma bifasciatum) is a is a saltwater fish in the wrasse family native to the coral reefs of the Caribbean. They form large schools over the reef and feed primarily on planktonic copepods as well as small crustaceans.
Like many other wrasse species, the bluehead is a protogynous sequential hermaphrodite; which means that individuals may begin life either as males or females, but females can change sex later in life and function as males. This is actually not all that uncommon among many marine fish species.
Young are yellow and white in color they grow out of this color phase and grow into the color phase that they get their name from with a blue head, black and white bars behind the head, and a green body.