Gymnothorax is a genus of fish in the family Muraenidae found in Atlantic, Indian, and Pacific Oceans.

With more than 120 species, it the most speciose genus of moray eels.

Smith (2012) notes that Gymnothorax as currently recognized is polyphyletic, but cautioned that comparative studies are needed before action is taken to resurrect generic synonyms of Gymnothorax.

[2] Species in this genus are slender (most skinny one being Gymnothorax gracilicauda [3])and can get up to 6-8 feet.

[2] Both FishBase and World Register of Marine Species recognize a total of 128 valid species in the genus.