How to Identify Yellowtail Fusilier

To identify Yellowtail Fusilier (Caesio cuning), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The dorsal half of the body is typically blue to bluish-green, transitioning to a reddish-pink or reddish-orange on the ventral half. A prominent, bright yellow caudal fin (tail) is a key distinguishing feature. The pectoral fins often have a black spot at their base.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Bright yellow caudal fin, Reddish-pink to reddish-orange belly, Black spot at the base of the pectoral fin, Deeply forked caudal fin

Dorsal fin

Single dorsal fin with X-XI spines and 14-16 soft rays. The spinous and soft-rayed portions are continuous.

Tail fin

Deeply forked, bright yellow.

Pectoral fin

Long and pointed, with a distinct black spot at the axil (base).

Distinctive fins

Pelvic fins are relatively small and located ventrally.

Identification Tips

1. 1

   Caudal Fin Color

   The most reliable identifier is the bright yellow, deeply forked caudal fin.

2. 2

   Body Coloration

   Observe the distinct blue/bluish-green dorsal and reddish-pink/orange ventral coloration.

3. 3

   Pectoral Fin Spot

   Look for the black spot at the base of the pectoral fins.

4. 4

   Schooling Behavior

   They are almost always seen in large, active schools in mid-water.

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