Slipper lobsters are a family of achelate(clawless) decapod crustaceans found in all warm oceans and seas. Despite their name, they are not true lobsters, but are more closely related to spiny lobsters and furry lobsters. Slipper lobsters are instantly recognisable by their enlarged antennae, which project forward from the head as wide plates. Some, such as the Moreton Bay bug and the Balmain bug are important food species.

They are night feeding animals and spend the day hiding under rocks and in deep holes and having no antennaes are not readily spotted as spiny lobsters by divers.