Yellow Tang

Zebrasoma flavescens

Type: saltwater, reef fish, surgeonfish

Yellow Tang

Physical Characteristics

Oval-shaped, laterally compressed body. Bright, uniform vibrant yellow coloration. High, sail-like dorsal and anal fins. Long, pointed snout for feeding in crevices. Possesses a sharp, white retractable spine (scalpel) on each side of the caudal peduncle (base of the tail).

Habitat & Distribution

Associated with coral-rich reefs and lagoons. Found in the Pacific Ocean, primarily around the Hawaiian Islands and reaching west toward Japan and the Ryukyu Islands. Lives at depths ranging from 2 to 46 meters.

Size & Weight

Standard adult size is approximately 15 to 20 cm (6 to 8 inches) in length. Maximum recorded weight is around 0.5 kg.

Similar Looking Species

Yellow Scopas Tang (Zebrasoma scopas) can appear yellow but usually has a browning or gradient effect. Juvenile Blue Tangs (Acanthurus caeruleus) are yellow but change color as they mature and have different fin shapes.

Ecological Role

Primary consumer/herbivore. Plays a crucial role in preventing algae overgrowth on coral reefs, which helps maintain the health and biodiversity of the reef ecosystem.

Diet

Mainly herbivorous, feeding on filamentous algae and benthic macroalgae. Occasionally acts as a cleaner fish, eating algae off the shells of sea turtles.

Behavior

Diurnal activity (active during the day). Can be found solitary or in loose schools. Adults are known to be territorial fish, especially toward other fish with similar body shapes or colors.

Reproduction

Group spawning occurs during the evening. They are pelagic spawners, releasing eggs and sperm into the water column. The larvae are planktonic and drift with currents before settling onto the reef as juveniles.

Conservation Status

Least Concern (IUCN), though local populations are closely monitored due to their high demand in the aquarium trade.

Identification Tips

Look for a disk-shaped, solid bright yellow body with a distinctive white 'tuck' or spine visible at the base of the tail. The dorsal fin is high and rounded when fully extended.

Interesting Facts

At night, their bright yellow color fades slightly and a dark horizontal band appears across the body to help them blend into the reef while sleeping. They are one of the most iconic and recognizable reef fish in the world.

Identified on: 4/18/2026

Mode: Standard