An abalone can be regarded as a large and highly evolved kind of limpet, using the term in its general sense. It possesses seven holes in its shell through which water is drawn to be filtered through a pair of gills, and a very large oval ‘foot’ or adductor muscle by which it adheres firmly to its rock. It is this foot which is the edible part. Obtaining it is not easy, since the creature normally lives at a depth which makes it necessary to dive and then prise the shells away from the rock. However, the rewards are commensurate with the task, since abalone fetches a good price and its beautiful shell also has some commercial value.