 While the crab may eat algae growing on rocks (such as "Corallina" and "Ulva lactuca"), they have also been observed feeding on barnacles and limpets.The crab captures limpets by quickly placing their chelae under the limpets shell when it begins to move and then flips it over.Notably, there is also a single observation of this species preying upon a Raukawa gecko, which is native to New Zealand.