Halicarcinus sp
Invertebrate
Arthropoda
Malacostraca
Hymenosomatidae
Carapace is oval. The first two pairs of legs are longer than the claws and the last two pairs are shorter. Usually brown with green or black tints. It is NZ's smallest crab, it measures only 6mm across.
Often found in green-shell mussel beds.
Likely a scavenger.
Collins: Gunson