Abbott's moray eel (Gymnothorax eurostus), also known as the stout moray, is a moray eel of the family Muraenidae. G. eurostus is found in the Indo-Pacific, and its range exhibits an antitropical distribution. Abbott's morays are found in the eastern Pacific from Costa Rica to Easter Island, at depths of . Its length of this species is up to .
Abbott's moray eel is a shallow-water, inshore reef species, though not often observed. They are also voracious nocturnal carnivores, feeding mostly on reef fishes.