Melanostomias tentaculatus is a species of barbeled dragonfish. It occurs in the Eastern and Western Atlantic, as well as the Pacific and Indian oceans. In total, it has roughly 19âÂÂ20 anal and 16âÂÂ17 dorsal soft rays. Along with its long, slim body, it has a dull snout and a maximum length of . They also inhabit waters at depths of .