It feeds on mainly planktonic crustaceans, with a preference of larvae of spiny lobster. Fishing of tuna, bonito, and spiny lobster is another major industry. Today its main industry is small scale fishing focused on conch and spiny lobster exports. These spiny lobster are nocturnal and solitary. Local fishermen also catch mutton snapper, groupers, spiny lobster and conch. Octopus, turtles, and spiny lobster make the park their home also. Fishing is limited to designated sport fish, spiny lobster, stone crab, blue crab and shrimp. Crawfish (Caribbean spiny lobster) are exported to the United States. The main fish resources are Patagonian toothfish and spiny lobster. Doukoku is modeled after and a Japanese spiny lobster. Gill nets and trammel nets are used for the Caribbean spiny lobster, "Panulirus argus". Sea life regularly caught for commercial purposes include conch, grouper, spiny lobster, snappers and tuna. Simple hexamers are found in the spiny lobster "Panulirus interruptus" and the isopod "Bathynomus giganteus". The primary natural resources are spiny lobster, conch, and other shellfish. The clawless spiny lobster, also known as rock lobster and sometimes referred to as crayfish.