Paracanthurus hepatus is a species of Indo-Pacific surgeonfish. A popular fish in marine aquaria, it is the only member of the genus Paracanthurus. This fish is a very easy species to take care of. It will require a larger aquarium in the 200 gallon range to satisfy their needs. Blue Tang is made popular by recent movies Finding Nemo and Finding Dory. IT is not recommended to house this fish in small aquariums.