How to Identify Sailfin Tang

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

Physical Characteristics

Body shape

compressed

Coloration

Adults typically display a pattern of alternating dark brown to black and pale yellow to white vertical bands across the body. The head is often darker, and the fins are similarly banded. Juveniles are often more yellowish with broader dark bands. The 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 erected., Elongated snout., Small, terminal mouth., A sharp, retractable scalpel-like spine (caudal peduncle spine) on each side of the caudal peduncle.

Dorsal fin

Single, very tall dorsal fin with 4-5 spines and 23-24 soft rays. When fully erect, it can be nearly as tall as the body length.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Well-developed, fan-like pectoral fins.

Distinctive fins

Anal fin is also very tall, mirroring the dorsal fin, with 3 spines and 19-20 soft rays. Pelvic fins are small.

Identification Tips

1. 1

   Fin Height

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

2. 2

   Body Pattern

   Alternating dark and light vertical bands are characteristic, though the exact shade and width can vary with age and geographic location.

3. 3

   Snout Shape

   Possesses a relatively elongated snout compared to other Zebrasoma species like the Yellow Tang (Z. flavescens).

4. 4

   Caudal Spine

   Like all surgeonfish, it has a sharp, retractable spine on each side of the caudal peduncle (base of the tail). This is a defensive weapon.

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