Stauroteuthis is a genus of deepwater octopus, a cephalopod mollusk. This is the only genus in the family Stauroteuthidae, and only two species have been described in this genus. The organisms live below 700 m (2,300 ft) water depth; although sometimes found as deep as 4 km (2.5 mi) underwater, they generally live at a water depth of around 2 km (1.2 mi). They do not possess a radula.