Hawaiian mud crabs are widely distributed through the Indo-Pacific region and around the Indian Pacific Ocea to east Africa. They are also found in Hawaii. People brought the these crabs to Hawaii in 1926. From then until 1935, commercial fishery hopefuls released 98 crabs on Oahu, Hawaii island and Molokai. With females producing 2 million eggs at a time, and releasing them offshore, it didn't take long for the crabs to get around. They are now found on all the main islands.
Samoan crabs are easily recognized by their broadly flattened back legs with paddle-like last segments. They have a smooth carapace with very robust claws, and is deep green in color.
Samoan crabs grow in a step-wise fashion through a succession of moults until they reach maturity after 18-24 months. The moult that marks the transition from juvenille to a mature state is the final or terminal moult for most male and all female crabs. Death is thought to occur at a maximum of four years. At maturity, the claws of the male increase in proportion to body size, comprising up to 40% of the body weight, making them prized for the meat content.
This fishery uses wire traps submerged on the seafloor to catch Dungeness crab. Traps are attached to lines and marked by floats on the surface. The traps attract crab with bait and capture them live.