Promethichthys prometheus, the Roudi escolar, is a species of snake mackerel native to the warm temperate and tropical waters of all the oceans where it occurs at depths of from 80mto800mm (260feetto2,600feetm) (mostly between 300mand400mm (1,000feetand1,300feetm)). This species grows to a length of 100cm (00inches) SL though most do not exceed 40cm (20inches) SL. It is important to local peoples as a food fish and is popular as a game fish though it has been reported to carry the ciguatera toxin. It is also utilized as bait. This species is the only known member of its genus.