How to Identify Lowfin Chub

To identify Lowfin Chub (Kyphosus analogus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Generally silvery-grey to bluish-grey, often with faint, narrow longitudinal stripes along the body. Fins may be darker. Some individuals may exhibit a yellowish tinge on the fins or body.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Relatively small mouth with incisor-like teeth, Deeply forked caudal fin, Scales extend onto the head and fin bases, Absence of a dark spot at the pectoral fin base, which distinguishes it from some other Kyphosus species.

Dorsal fin

Single dorsal fin with 10-11 spines and 11-12 soft rays. The spinous and soft-rayed portions are continuous, with the spinous portion being lower than the soft-rayed portion.

Tail fin

Deeply forked caudal fin.

Pectoral fin

Moderately sized pectoral fins.

Distinctive fins

Anal fin with 3 spines and 10-11 soft rays. Pelvic fins are thoracic.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for an oval, compressed body that is silvery-grey to bluish-grey, often with subtle longitudinal stripes. The overall appearance is robust.

2. 2

   Fin Structure

   Observe the continuous dorsal fin with a lower spinous portion and a higher soft-rayed portion. The caudal fin is deeply forked. The absence of a dark spot at the pectoral fin base is a key differentiator.

3. 3

   Mouth and Teeth

   Note the relatively small mouth with incisor-like teeth, adapted for grazing on algae.

4. 4

   Habitat and Behavior

   Often seen in schools grazing on algae over rocky reefs in shallow, clear waters.

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