Yellowtail Tang
Yellowtail Tang
Yellowtail Tang
© François Libert
Fishes · Bony fishes · Surgeonfishes

Yellowtail Tang

Zebrasoma xanthurum (Blyth, 1852)
syn. Acanthurus xanthurus, Zebrasoma xanthurus
10 - 37 cm2-20 mLeast Concern
1226

The Zebrasoma xanthurum, commonly known as the purple tang or yellowtail tang, is a striking marine fish found in the northundefined. This species, part of the family Acanthuridae, prefers coral-rich or rocky areas and typically resides at depths of up to 20 meters (66 feet). It is most frequently seen in tropical regions such as the 🌊 Red Sea, the 🌊 Gulf of Aden, and Arabian Peninsula coastlines, while presence in places like the 🇲🇻 Maldives may be due to misidentification or aquarium releases.

The purple tang is easily recognizable by its deep blue to purple body contrasted with a vivid yellow tail fin. It sports black spots on the head and front of its body and features irregular black horizontal lines across the body and fins, except for the tail fin. Its pectoral fins have a yellow outer portion, making it quite a colorful sight. Young fish have dark brown lines along their bodies, and as adults, they can grow up to 36.7 cm (14.4 inches) in total length, though their common size is about 10 cm (3.9 inches).

Zebrasoma xanthurum's body is laterally compressed with a protruding snout. It has a distinct fin structure, with five spines and 24-25 soft rays on the dorsal fin and three spines with 19-20 soft rays on the anal fin. The snout has a concave profile, and a patch of velvet-like bristles is found on the caudal peduncle before the spine. Juveniles have rounded tail fins, which can become slightly rounded or truncate in adults.

These fish generally form groups and have a diet primarily composed of filamentous algae. They graze during the day, either alone or in pairs, and retreat into coral shelters or crevices at night. Juvenile purple tangs use their environment to hide among corals, providing them with protection. While occasionally caught by traps or trawls, the distinctive beauty and ecological role of the purple tang make it a valuable species in marine environments. The intriguing striped pattern suggested by its scientific name, Zebrasoma, reflects its connection to land animals, as "Zebra" implies, while "xanthurum" highlights its signature yellow tail.

Why it's threatened

There are no major threats known for this species.

Surgeonfishes show varying degrees of habitat preference and utilization of coral reef habitats, with some species spending the majority of their life stages on coral reef while others primarily utilize seagrass beds, mangroves, algal beds, and /or rocky reefs. The majority of surgeonfishes are exclusively found on coral reef habitat, and of these, approximately 80% are experiencing a greater than 30% loss of coral reef area and degradation of coral reef habitat quality across their distributions. However, more research is needed to understand the long-term effects of coral reef habitat loss and degradation on these species' populations. Widespread coral reef loss and declining habitat conditions are particularly worrying for species that recruit into areas with live coral cover, especially as studies have shown that protection of pristine habitats facilitate the persistence of adult populations in species that have spatially separated adult and juvenile habitats (Comeros-Raynal et al. 2012).

Threat classification from the IUCN Red List.

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Last Update: June 28, 2026