How to Identify Yellow Eye Tang

To identify Yellow Eye Tang (Ctenochaetus strigosus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Adults typically exhibit a brownish to yellowish-brown body with numerous fine, pale blue or yellow longitudinal lines. The most striking feature is a prominent bright yellow ring around the eye. The dorsal and anal fins are often edged in blue. Juveniles are typically bright yellow, gradually transitioning to the adult coloration as they mature. Coloration can also vary geographically, with some populations displaying more orange or darker hues.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Bright yellow ring around the eye, Numerous fine longitudinal lines on the body, Bristle-like teeth adapted for scraping detritus, Scalpel-like spine on each side of the caudal peduncle

Dorsal fin

Dorsal fin with 8 spines and 25-28 soft rays, continuous and relatively long.

Tail fin

Lunate (crescent-shaped) caudal fin.

Pectoral fin

Pectoral fins are moderately sized and transparent to yellowish.

Distinctive fins

The presence of a sharp, retractable scalpel-like spine on each side of the caudal peduncle (the narrow part of the body connecting to the tail fin) is characteristic of all surgeonfish (Acanthuridae).

Identification Tips

1. 1

   Eye Ring

   The most definitive feature is the bright yellow ring encircling the eye, which is present in both juvenile and adult stages.

2. 2

   Body Coloration and Pattern

   Adults have a brownish to yellowish-brown body with numerous fine, pale blue or yellow longitudinal lines. Juveniles are uniformly bright yellow.

3. 3

   Mouth and Teeth

   Observe its small, downward-pointing mouth with numerous bristle-like teeth, indicative of its detritivorous feeding strategy.

4. 4

   Caudal Spine

   Like all surgeonfish, it possesses a sharp, retractable spine on each side of the caudal peduncle. While not always visible, its presence confirms it as a tang.

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