Paracanthurus hepatus is a
species of Indo-Pacific
surgeonfish. A popular fish in
marine aquaria, it is the
only member of the
genus Paracanthurus. A number of common names are attributed to the species, including
regal tang,
palette surgeonfish,
blue tang (leading to confusion with the Atlantic
Acanthurus coeruleus),
royal blue tang,
hippo tang,
flagtail surgeonfish,
Pacific regal blue tang and
blue surgeonfish.