In central California, sea otters feed mostly on sea urchins, abalones, and rock crabs. Black abalones are herbivorous gastropods, and feed mostly on drift algae and kelp. Those of greatest interest include invertebrate species like crabs, shrimps, abalones, clams, oysters, and scallops. Paua belong to the molluscan genus Haliotis, more commonly known as abalones. The reef is home to various lobsters, such as southern rock lobsters and blacklip abalones. Humans have harvested black abalones along the California Coast for at least 10,000 years. The dish is a local specialty of Jeju Island where abalones are commonly harvested. The growth rate of "Haliotis asinina" is the fastest of all the abalones. In Mexico, there is a total allowable catch limit for black abalones. Abalones reach maturity at a relatively small size. Rocks are used to knock abalones from the structure on which they are growing.