Gymnothorax nudivomer
Encounter Rate
Spotting Difficulty
Best Season
Year-round
Depth Range
5-50 meters
The yellowmouth moray eel is one of Komodo's most elegant moray species, distinguished by its uniform dark brown body and the vivid yellow interior of its mouth that is dramatically displayed as it gapes to breathe. This medium to large moray reaches up to 1.8 metres and is typically found in deeper reef crevices and along walls at moderate depths. In Komodo, yellowmouth morays are less commonly encountered than giant morays but equally appreciated by divers who spot them peering from their holes with mouths rhythmically opening and closing. The flash of bright yellow inside the dark mouth creates a striking visual contrast that makes them particularly photogenic. Like all moray eels, they possess a second set of pharyngeal jaws in the throat — a mechanism made famous by science fiction films — that shoots forward to grasp prey and drag it down into the oesophagus. Yellowmouth morays are primarily nocturnal hunters, emerging from their daytime refuges to hunt for sleeping fish and octopuses under cover of darkness. Their excellent sense of smell compensates for their relatively poor eyesight, allowing them to track prey through the complex reef environment.
Average Size
0.8-1.2m
Size Range
0.4-1.8m
Maximum Size
1.8m
Nocturnal predator feeding on reef fish, octopuses, and crustaceans. Uses an exceptional sense of smell to locate prey in the dark, aided by pharyngeal jaws that pull captured prey into the throat.
The yellowmouth moray eel is one of Komodo's most elegant moray species, distinguished by its uniform dark brown body and the vivid yellow interior of its mouth that is dramatically displayed as it gapes to breathe. This medium to large moray reaches up to 1.8 metres and is typically found in deeper reef crevices and along walls at moderate depths. In Komodo, yellowmouth morays are less commonly encountered than giant morays but equally appreciated by divers who spot them peering from their holes with mouths rhythmically opening and closing. The flash of bright yellow inside the dark mouth creates a striking visual contrast that makes them particularly photogenic. Like all moray eels, they possess a second set of pharyngeal jaws in the throat — a mechanism made famous by science fiction films — that shoots forward to grasp prey and drag it down into the oesophagus. Yellowmouth morays are primarily nocturnal hunters, emerging from their daytime refuges to hunt for sleeping fish and octopuses under cover of darkness. Their excellent sense of smell compensates for their relatively poor eyesight, allowing them to track prey through the complex reef environment.
This species plays an important role in the marine ecosystem of Komodo National Park. Responsible diving practices help protect these animals and their habitat for future generations.
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The bright yellow colouration of the mouth interior may serve as a warning signal to potential predators or competitors. It is particularly dramatic when displayed during the normal breathing gape, creating a striking contrast against the dark body.
