Opisthoteuthis medusoides is a cirrate octopus living off the coast of Tanzania near Dar es Salaam. However, its actual range may be more extensive.
The octopus lives deep, where it occupies the benthic zone, or seafloor.
The species is known from only two juvenile octopuses. Both had little pigment. Because of the octopus' medusoid (jellyfish-like) body shape, the species was given the name medusoides. Male opisthoteuthids generally have enlarged suckers on multiple arms; O. medusoides is different, having enlarged suckers on only one arm. "A redescription of this species is badly needed," write Richard E. Young and Michael Vecchione, both scientists who research cephalopods.