How to Identify Whitemouth Moray Eel

To identify Whitemouth Moray Eel (Gymnothorax meleagris), look at these key features.

Physical Characteristics

Body shape

eel-like

Coloration

The body is typically dark brown to black, densely covered with small, round, white to yellowish spots. The most distinguishing feature is the bright white or pale yellow lining of the mouth and gill opening, which is visible even when the mouth is closed.

Scale type

none

Mouth position

terminal

Distinctive features

Numerous small, white to yellowish spots covering the entire body, including the head and fins., Distinctly white or pale yellow mouth lining, contrasting sharply with the dark body., Absence of pectoral and pelvic fins.

Dorsal fin

Continuous, originating just behind the head and extending to the caudal fin.

Tail fin

Confluent with the dorsal and anal fins, forming a continuous fin fold around the posterior end of the body.

Pectoral fin

Absent

Distinctive fins

Pelvic fins are also absent, a characteristic of all moray eels.

Identification Tips

1. 1

   Body Coloration and Spots

   Look for a dark body (brown to black) covered in numerous small, distinct white to yellowish spots. The spots are generally uniform in size and distribution.

2. 2

   Mouth Lining

   The most reliable distinguishing feature is the bright white or pale yellow interior of the mouth, which is often visible even when the eel is at rest with its mouth slightly agape.

3. 3

   Absence of Pectoral Fins

   Like all moray eels, the Whitemouth Moray lacks pectoral and pelvic fins, which helps differentiate them from other eel families.

4. 4

   Size

   Adults typically reach a maximum length of about 120 cm (47 inches), though most commonly observed individuals are smaller, around 60-90 cm (24-35 inches).

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