How to Identify Dwarf Grouper

To identify Dwarf Grouper (Epinephelus merra), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is typically pale yellowish-brown to whitish, covered with numerous closely set, hexagonal to rounded dark brown or black spots that form a distinct honeycomb pattern. The spots extend onto the fins. The belly is usually lighter and may have fewer or fainter spots. Juveniles often have more pronounced spotting.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Honeycomb-like pattern of dark spots covering the entire body and fins., Relatively small size for a grouper, typically not exceeding 30 cm., Robust body with a large mouth., Three distinct dark spots often present on the lower jaw.

Dorsal fin

Single dorsal fin with 11 spines and 15-17 soft rays. The spiny portion is longer than the soft-rayed portion.

Tail fin

Rounded caudal fin.

Pectoral fin

Large, rounded pectoral fins.

Distinctive fins

All fins are spotted, mirroring the body pattern.

Identification Tips

1. 1

   Spotting Pattern

   Look for the characteristic honeycomb or hexagonal dark spots covering the entire body and fins. This is the most reliable identifier.

2. 2

   Size

   Adults rarely exceed 30 cm (12 inches) in total length, making them one of the smaller grouper species.

3. 3

   Lower Jaw Spots

   Often has 3 distinct dark spots on the underside of the lower jaw, though these can be less prominent in some individuals.

4. 4

   Fin Shape

   Rounded caudal fin and large, rounded pectoral fins are typical.

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