A Spiny Lithode Crab, Acantholithodes hispidus
One reason why there were not many prawns in this trap! Not what I was hoping for. This crab is not an unusual bycatch of prawn fishermen. Please see, https://www.centralcoastbiodiversity.org/spiny-lithode-crab-bull-acantholithodes-hispidus.html The crab was brought up from a depth of ~122 meters. Hopefully it made it safely back home.
The Spiny Lithode Crab (Acantholithodes hispidus) is species of the infraorder Anomura and as such not a true "Crab" (Brachyura), but rather closer related to Hermit Crabs and the like.