Rostral spines stout, straight, divergent; hepatic spine sharp. Anterolateral angle of basal antennal article with spine. Preorbital spine broad, upturned and antorbital spine sharp; intercalated spine well separated from supraorbital eave, directed obliquely forward. Walking legs with propodi strongly expanded. Up to 7 cm long.
Common in rock pools the Spiny Seaweed Crab hides on rock platforms and in sandy environments rich in algae, sponges or seagrass. These crabs have small hooked hairs on their carapace to which they attach bits of seaweed, sponge or bryozoan. This camouflage, and moving very slowly, makes them hard to see in their natural habitat.
Low intertidal to 10 m depth.
Southern temperate oceans, Kermadec Islands and southern Australia.
Not harmful but a nip from claws could be painful.
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed