Lithodes santolla (the scientific classification of the southern king crab) is a species of king crab native to the coast of Chile, Argentina, and Peru. They can typically live in waters up to 150 meters deep, but some fishermen have also found them in depths of up to 600 meters.
The fishing process involves cooking the legs and then flash-freezing them to preserve freshness. Thus, preparing the legs for consumption simply means reheating them using a steamer, an oven, or even a microwave, then eaten as is or dipped in a savory sauce.