How to Identify Whitetail Bristletooth Tang

To identify Whitetail Bristletooth Tang (Ctenochaetus flavicauda), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Adults are typically dark brown to black, often with fine longitudinal striations or spots that can be difficult to discern without close inspection. The most distinguishing feature is the bright white to pale yellow caudal fin. Juveniles are often more yellowish-brown overall, gradually darkening with age.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

White or pale yellow caudal fin (tail), Numerous small, flexible, bristle-like teeth, Scalpel-like spine on each side of the caudal peduncle

Dorsal fin

Single dorsal fin with 8 dorsal spines and 25-28 soft rays.

Tail fin

Lunate (crescent-shaped) and distinctly white or pale yellow.

Pectoral fin

15-16 rays, typically clear to slightly dusky.

Distinctive fins

The caudal fin's coloration is the primary diagnostic feature.

Identification Tips

1. 1

   Caudal Fin Coloration

   The most reliable identifier is the bright white or pale yellow caudal fin, which contrasts sharply with the dark body.

2. 2

   Body Coloration

   Adults are dark brown to black. Juveniles can be more yellowish, but the white tail remains a key feature.

3. 3

   Body Shape and Size

   Typical surgeonfish body shape, laterally compressed and oval. Reaches a maximum of 16 cm (6.3 inches).

4. 4

   Dentition (if observable)

   Like all Ctenochaetus, it possesses numerous fine, bristle-like teeth, though this is difficult to observe in the field.

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