How to Identify Deepwater Squirrelfish

To identify Deepwater Squirrelfish (Sargocentron megalops), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Predominantly reddish to silvery-red, often with faint longitudinal stripes or mottling. Fins may have reddish hues. The large eyes are a prominent feature.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Large eyes, characteristic of deepwater species, Strongly ctenoid scales, A prominent spine at the angle of the preopercle (cheek bone), Deep body, laterally compressed

Dorsal fin

Single dorsal fin, deeply notched, with 11 spines followed by 12-14 soft rays. The spiny portion is typically longer than the soft-rayed portion.

Tail fin

Moderately forked caudal fin.

Pectoral fin

Pectoral fins are relatively short, with 13-15 rays.

Distinctive fins

Anal fin with 4 spines and 8-9 soft rays. Pelvic fins with 1 spine and 7 soft rays.

Identification Tips

1. 1

   Eyes

   Unusually large eyes relative to body size, indicative of its deepwater habitat.

2. 2

   Coloration

   Overall reddish to silvery-red body color, which can appear darker in deeper waters.

3. 3

   Preopercular Spine

   Presence of a strong, sharp spine on the lower margin of the preopercle (gill cover).

4. 4

   Dorsal Fin

   A single, deeply notched dorsal fin with a prominent spiny anterior portion.

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