Lampadioteuthis megaleia is a small, colorful squid from the family Lycoteuthidae, it is the only species in the only genus in the monotypic subfamily Lampadioteuthinae, it is sometimes known as the wonderful firefly squid. It differs from the other species of the Lycoteuthidae mainly by having a hectocotylus in the males and by the possession of a rostrum on the gladius.