Somalia's territorial waters are prime fishing grounds for highly migratory marine species, such as tuna. A narrow but productive continental shelf contains several demersal fish and crustacean species. Fish species found exclusively in the nation include ''Cirrhitichthys randalli'' (Cirrhitidae), ''Symphurus fuscus'' (Cynoglossidae), ''Parapercis simulata'' OC (Pinguipedidae), ''Cociella somaliensis'' OC (Platycephalidae), and ''Pseudochromis melanotus'' (Pseudochromidae).