How to Identify Sailfin Tang

To identify Sailfin Tang (Zebrasoma veliferum), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Juveniles are typically yellow with white vertical bands. Adults display a brownish-yellow to dark brown body with numerous thin, pale vertical bands that extend onto the dorsal and anal fins. The face often has a lighter, yellowish hue. Coloration can intensify or fade depending on the fish's mood or stress level.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Extremely tall, sail-like dorsal and anal fins that can be fully extended or retracted., A small, protractile mouth adapted for grazing algae., A sharp, retractable scalpel-like spine on each side of the caudal peduncle (tail base).

Dorsal fin

Single, very tall dorsal fin with 4-5 spines and 23-28 soft rays. When fully erect, it can be as tall as the body depth.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Well-developed pectoral fins, used for propulsion and maneuvering.

Distinctive fins

The anal fin is also very tall, mirroring the dorsal fin, with 3 spines and 19-23 soft rays. Both dorsal and anal fins are covered in the same banding pattern as the body.

Identification Tips

1. 1

   Fin Height

   The most distinguishing feature is the exceptionally tall, sail-like dorsal and anal fins, which are much taller than those of most other tang species, especially when fully extended.

2. 2

   Body Pattern

   Adults have numerous thin, pale vertical bands over a dark brown to brownish-yellow body. Juveniles are bright yellow with white bands.

3. 3

   Mouth Shape

   Possesses a small, pointed mouth, characteristic of algal grazers.

4. 4

   Caudal Spine

   Like all surgeonfishes, it has a sharp, retractable spine (scalpel) on each side of the caudal peduncle.

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