One of the most vibrantly-colored of its genus when young sporting a vibrant yellow body, these fishes are aptly named truncatus in reference to thier short tail fin which lacks the normal pointed tips that are prevelent in all other species of the genus Ctheochaetus.

The Squaretail Bristletooth Tang boasts a brown to orange body with pale blue to bright yellow spots on the head, body, and base of the dorsal fin. The outer part of the eye is ringed in bright yellow. Ctenochaetus tangs have a protruding mouth with bristle-like teeth they can move individually in order to sift, sort, and scrape in search of food.

A 70 gallon or larger aquarium is necessary to provide plenty of swimming room. It is aggressive towards other Tangs and may be harassed by its own species, but is peaceful with other fish and sessile invertebrates. It is best to house only one specimen per tank.

Although Tangs will eat meaty foods along with the other fish in the aquarium, it is important that they are offered plenty of marine based seaweed and algae. This will strengthen their immune system, reduce aggression and improve their overall health. Offer dried seaweed tied to a rock or use a veggie clip, and feed at least 3 times per week. Sea Veggies, Seaweed Salad and Seaweed Selects are all ideal products and are very easy to use. These are great fish for controlling algae in the saltwater fish or reef aquarium.