How to Identify Blacktail Snapper

To identify Blacktail Snapper (Lutjanus fulvus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Body color varies from reddish-brown to yellowish-brown or olive-brown dorsally, fading to lighter shades or silvery-white ventrally. Fins are typically yellowish, with the most distinctive feature being the entirely black caudal fin. Juveniles may have a series of faint, narrow, dark longitudinal stripes on the sides.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Entirely black caudal fin (tail fin)., A prominent, dark spot often present on the upper part of the pectoral fin base., Relatively large eyes., Slightly pointed snout.

Dorsal fin

Single dorsal fin with 10 spines and 13-14 soft rays. The spinous and soft-rayed portions are continuous, with a slight notch.

Tail fin

Caudal fin is emarginate (slightly forked) and entirely black.

Pectoral fin

Pectoral fins are relatively long, reaching to or beyond the anus, with 16-17 rays.

Distinctive fins

Anal fin with 3 spines and 8 soft rays. Pelvic fins with 1 spine and 5 soft rays.

Identification Tips

1. 1

   Caudal Fin Coloration

   The most reliable distinguishing feature is the uniformly black caudal fin, which contrasts with the lighter body color.

2. 2

   Pectoral Fin Spot

   Look for a dark spot or blotch at the base of the pectoral fin, though its prominence can vary.

3. 3

   Body Shape and Color

   Observe the compressed body and the general reddish-brown to yellowish-brown hue. Juveniles may have faint stripes.

4. 4

   Fin Ray Counts

   For precise identification, count the dorsal fin spines (10) and soft rays (13-14), and anal fin spines (3) and soft rays (8).

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