Appearance
Blue tangs have a brilliant iridescent blue body, a bright yellow tail, a long sharp dorsal fin, and an oval shape. They can grow up to 20 inches long.
Behavior
These herbivorous fish graze on algae, live in large schools, swim actively around coral reefs, can be territorial during breeding, and are naturally curious.
Other Traits
Blue tangs can live 20 years or more, help keep coral reefs healthy by eating algae, and are popular in home aquariums.