How to Identify Greasy Grouper

To identify Greasy Grouper (Epinephelus tauvina), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Variable, typically pale grey to greenish-brown, covered with numerous small, dark reddish-brown to black spots on the head, body, and fins. These spots are often irregular in shape and size. Some individuals may display five faint, irregular, dark vertical bars on the body, which are more prominent in juveniles or stressed individuals. The belly is usually paler.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Robust body, slightly compressed., Large mouth with several rows of sharp, conical teeth., Rounded caudal fin in adults, truncate in juveniles., Preopercle finely serrated, with a distinct notch above the angle., Upper edge of the operculum is convex., Scales are ctenoid, relatively small.

Dorsal fin

11 spines, 14-16 soft rays. The spinous and soft-rayed portions are continuous, with the spinous portion being lower than the soft-rayed portion.

Tail fin

Rounded in adults, truncate in juveniles. 8 branched rays.

Pectoral fin

18-19 rays. Relatively large and rounded.

Distinctive fins

Anal fin with 3 spines and 8 soft rays. Pelvic fins are short, originating below or slightly behind the pectoral fin base.

Identification Tips

1. 1

   Coloration and Spotting

   Look for the characteristic pale grey to greenish-brown body covered with numerous small, dark reddish-brown to black spots. These spots are generally smaller than the pupil of the eye.

2. 2

   Caudal Fin Shape

   Adults typically have a rounded caudal fin, while juveniles may have a more truncate (straight) caudal fin.

3. 3

   Preopercle

   Examine the preopercle (bone before the gill cover); it is finely serrated with a distinct notch above the angle.

4. 4

   Dorsal Fin

   Count the dorsal fin spines (11) and soft rays (14-16). The spinous and soft-rayed portions are continuous.

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