How to Identify Dog Snapper

To identify Dog Snapper (Lutjanus jocu), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Adults are typically olive-brown to reddish-brown dorsally, fading to a lighter, often reddish or yellowish, underside. A distinctive white or pale triangular patch is often present below the eye. Fins are usually reddish or dusky. Juveniles may exhibit a series of vertical bars or blotches, and a prominent white spot below the dorsal fin.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Two prominent, enlarged canine teeth in the upper jaw, visible even when the mouth is closed., A distinctive white or pale triangular patch below the eye., A dark, often blue, streak running from the snout to the eye in some individuals., Absence of a black spot on the side below the dorsal fin (distinguishes from some other snappers).

Dorsal fin

Single dorsal fin, deeply notched, with 10 spines followed by 13-14 soft rays.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Long pectoral fins, reaching to or beyond the anus, with 16-17 rays.

Distinctive fins

Anal fin with 3 spines and 8 soft rays. Pelvic fins are relatively short.

Identification Tips

1. 1

   Canine Teeth

   Look for the two prominent, enlarged canine teeth in the upper jaw that protrude even when the mouth is closed. This is a key distinguishing feature.

2. 2

   Suborbital Patch

   Identify the distinctive white or pale triangular patch located directly below the eye. This patch is often very clear in live specimens.

3. 3

   Coloration

   Observe the overall olive-brown to reddish-brown body color, often with a reddish tint on the fins and underside. Juveniles may have faint bars.

4. 4

   Absence of Black Spot

   Note the lack of a prominent black spot below the anterior soft dorsal fin rays, which is present in some other snapper species like the Gray Snapper (Lutjanus griseus).

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