Genus Enchelycore

Enchelycore is a genus of moray eels in the family Muraenidae. Enchelycore species are generally small to medium-sized eels, most ranging from 2 to 3 feet (61 to 91 cm) in length, with the largest being the Mosaic Moray (E. ramosa), which reaches a length of 6 feet (180 cm). Members of the genus feature distinctive, curved jaws that prevent them from fully closing their mouth and aids them in catching, and holding on to prey. Enchelycore species can also feature extremely bright colors (E. pardalis, E. anatina) and ornate markings (E. lichenosa). (Wikipedia)

Leopard moray eel (Enchelycore pardalis)

(Phylum: Chordata. Class: Actinopterygii, Order: Anguilliformes, Family: Muraenidae, Genus: Enchelycore, Species: Enchelycore pardalis)
Enchelycore pardalis, commonly called Leopard moray eel or Dragon moray, is a species of marine fish in the family Muraenidae.
This eel is characterized by its narrow, curved jaws, vivid red stripes on the head, and elongated tubular nostrils. (Wikipedia)

   

Left: Leopard moray eel (Enchelycore pardalis)
Middle: Dragon moray eel (Enchelycore pardalis) in Japan
Right: Dragon moray (Enchelycore pardalis) at Suma aquarium, Japan.

   

Left: Dragon moray (Enchelycore pardalis) at Suma aquarium, Japan.
Middle: A dragon moray (Enchelycore pardalis)
Right: Dragon Morey Eel (Ribboned Dragon Fish)

 

Left: Leopard moray eel (Video) filmed in Shanghai Ocean Aquarium, China.
Middle: Moray Eel (animation)   Right: Moray Eel (animation)

Genus Muraena

Muraena is a genus of twelve species of large eels in the family Muraenidae.
In the majority, a long fin runs from the head along the back, round the tail to the vent, but all are destitute of pectoral and ventral fins. The skin is scaleless and smooth, in many species ornamented with varied and bright colours, so that these fishes are frequently mistaken for snakes.
The mouth is wide, the jaws strong and armed with formidable, generally sharply pointed, teeth, which enable the Muraena not only to seize its prey (which chiefly consists of other fishes) but also to inflict serious, and sometimes dangerous, wounds on its enemies.
Some of the tropical Muraenas exceed a length of 5 feet (150 cm), but most of the species, among them the Mediterranean moray, are somewhat smaller. The latter, the "murena" of the Italians and the Muraena helena of ichthyologists, was considered by the ancient Romans to be one of the greatest delicacies. (Wikipedia)

Muraena helena (Mediterranean moray)

Muraena helena (Mediterranean moray) (sometimes also called Roman eel) is a fish of the moray eel family. It has a long eel-like body and is found in the eastern Atlantic Ocean and Mediterranean Sea. Its bite can be dangerous to humans.
The Mediterranean moray has an elongated, eel-like body and can reach a length of 1.5 meters and weigh over 15 kilograms. Its coloration varies from dark grey to dark brown with fine dark spots. The skin is slimy and without scales. The dorsal fin begins behind its head and continues to the caudal fin (fused with the anal fin). Pectoral fins are absent, teeth are long and sharp-pointed (like other morays), the mouth is long and robust and reaches behind the gills.

   

Left: Muraena helena (Moray eel) in Sala Maremagnum of Aquarium Finisterrae (House of the Fishes), in Corunna, Galicia, Spain.
Muraena helena showing typical moray eel morphology: robust anguilliform shape, lack of pectoral fins and circular gill openings.
Middle: Muraena helena
Right: Muraena helena Linosa, Mediterranean Sea

Genus Gymnothorax

Gymnothorax is a genus of fish in the family Muraenidae found in Atlantic, Indian and Pacific Ocean. (Wikipedia)

   

Left: Gymnothorax fimbriatus Taken off Sipadan, Borneo, Malaysia.
Muraena helena showing typical moray eel morphology: robust anguilliform shape, lack of pectoral fins and circular gill openings.
Middle: Gymnothorax rueppelliae
Right: Gymnothorax favagineus (Honeycomb moray eel)