About Gymnothorax rueppelliae (McClelland, 1844)
Gymnothorax rueppelliae has a pale grey to greyish-brown body marked with 16–21 dark bars, and a bright yellow head that has a dark spot at the corner of the mouth, along with vomerine teeth. Its snout and the front of the head are yellowish, and the body is covered in wide, completely encircling dark brown bands that fade as the eel ages. A key distinguishing feature of this species is that its bands are regular and continuous all the way around the body, and extend onto the head as far as the snout.
This species is distributed across the Pacific and Indian Oceans. Its populations occur in lagoons and coral reefs, ranging from the Red Sea and East Africa to Hawaii, the Tuamotu Archipelago, and the Marquesas Islands, extending north to waters north of the Ryukyu Islands and south to waters south of the Great Barrier Reef.
Gymnothorax rueppelliae is a nocturnal, primarily benthic species. It lives in the clear waters of lagoons and seaward reefs, at depths between 1 and 40 meters (3 feet 3 inches to 131 feet 3 inches); there are also reports of individual eels living on reefs as deep as 30 meters (98 feet).
Like other moray eels, Gymnothorax rueppelliae is oviparous, meaning it lays eggs, with little to no embryonic development taking place inside the mother. Similar to other moray eels, its reproductive behavior is thought to be influenced by water temperature, lunar cycles, and seasonal changes. Further research is still needed to understand the specific spawning sites and behaviors of this species in the wild.
