Blue Tang and Similar Species
Acanthurus coeruleus
Got a photo? Identify fish instantly with the Fishby app.
Open the appSeveral fish can be confused with Blue Tang. Here are the key differences.
Species often confused with {name}
Ocean Surgeonfish
Acanthurus tractus (formerly Acanthurus bahianus)
Key differences: The Ocean Surgeonfish is typically brownish-gray to olive, lacking the vibrant blue coloration of A. coeruleus. It also has a more elongated body shape and a less pronounced lunate caudal fin. While both have caudal spines, their overall appearance is distinct.
Doctorfish
Acanthurus chirurgus
Key differences: The Doctorfish is generally grayish-brown with 10-12 faint, narrow, dark vertical bars on its body. It lacks the bright blue or yellow coloration of the Blue Tang. Its caudal fin is typically dark, not yellow. The caudal spine is also present.
Yellow Tang
Zebrasoma flavescens
Key differences: While also a popular aquarium fish and bright yellow, the Yellow Tang belongs to a different genus (Zebrasoma) and has a more elongated snout and a sail-like dorsal fin. Its body shape is more disc-like and less oval than A. coeruleus. It is found in the Pacific Ocean, not the Atlantic.
Explore Blue Tang
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.