Blacknosed Butterflyfish - Johnrandallia nigrirostris
The genus name was reclassified to Johnrandallia in 1974, with the genus named after marine biologist John E. Randall (previously, it was placed under the genus Chaetodon). So far, only 1 species is classified under this genus.
In locations such as Socorro, Cocos Island and Galapagos this Blacknosed Butterflyfish/Barberfish serves as Cleaner fish, cleaning up parasites from Sharks that comes to them at certain part of the reef that are also known as Cleaning Stations.
''Johnrandallia nigrirostris'', the blacknosed butterflyfish or barberfish, is a species of fish in the family Chaetodontidae, the butterfly fishes. It is found in the East Pacific, and it sometimes acts as a cleaner fish. It is the only member of the genus ''Johnrandallia'', named after the ichthyologist John E. Randall, but in the past it was commonly placed in ''Chaetodon''.