Ctenochaetus

Ctenochaetus is a genus of marine fish belonging to the family Acanthuridae, commonly known as surgeonfishes. These fish are characterized by their compressed oval bodies and distinctive scalpel-like spines on their caudal peduncles. The genus includes several species that are popular in the aquarium trade.

Members of Ctenochaetus typically have small, bristle-like teeth which they use to graze on algae. They are generally small to medium-sized, reaching lengths of up to 30 centimeters depending on the species. Their coloration varies among species but often includes patterns of spots, stripes, or bands in shades of brown, blue, or yellow.

These fish are found in tropical and subtropical waters of the Indo-Pacific region, inhabiting coral reefs and lagoons. They play an important ecological role in reef ecosystems by controlling algae growth. Some notable species include the bristletooth tang (Ctenochaetus striatus) and the Kole tang (Ctenochaetus hawaiiensis).

Ctenochaetus species are generally not considered threatened, though they may be impacted by habitat degradation and collection for the aquarium trade. They are relatively hardy in captivity but require large tanks with ample swimming space and a diet rich in algae.