How to Identify Black Rockcod

To identify Black Rockcod (Epinephelus daemelii), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Adults are typically dark grey to black, often with irregular lighter blotches or saddles, which can be more pronounced in juveniles. The fins are usually dark, sometimes with lighter margins. Coloration can vary with mood and environment.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Large, robust body, Large mouth with thick lips, Strong, spiny dorsal fin, Rounded caudal fin, Often exhibits 5-6 irregular, dark vertical bands or saddles, especially when young

Dorsal fin

Single, long dorsal fin with 11 spines and 14-16 soft rays. The spiny portion is longer than the soft-rayed portion.

Tail fin

Rounded caudal fin.

Pectoral fin

Large and rounded, typically with 17-19 rays.

Distinctive fins

Pelvic fins are relatively short, originating below or slightly behind the pectoral fin base.

Identification Tips

1. 1

   Size and Shape

   A large, heavy-bodied fish, reaching up to 1.5 meters in length and over 100 kg in weight. The body is robust and slightly compressed.

2. 2

   Coloration

   Adults are uniformly dark grey to black, sometimes with faint, irregular lighter blotches. Juveniles are lighter with distinct dark saddles or bands.

3. 3

   Mouth

   Possesses a very large, protractile mouth with thick lips, indicative of its predatory feeding strategy.

4. 4

   Dorsal Fin

   A single, continuous dorsal fin with a prominent spiny anterior portion (11 spines) and a soft-rayed posterior portion (14-16 rays).

5. 5

   Caudal Fin

   The tail fin is distinctly rounded, a common feature among many grouper species.

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