The hairy stone crab (Lomis hirta) is a crab-like anomuran crustacean that lives in the littoral zone of southern Australia from Bunbury, Western Australia, to the Bass Strait.

It is 1.5–2.5 cm (0.6–1.0 in) wide,[2] slow-moving, and covered in brown hair which camouflages it against the rocks upon which it lives.

[3] Some controversy exists about the relationship between L. hirta and the other anomuran families.

Candidates for its closest relatives have included hermit crabs,[4] specifically king crabs,[5] and Aegla.

[6][7] It is clear, however, that Lomis represents a separate case of carcinisation.