WordNet (r) 3.0 (2006):

whitetip shark
    n 1: smooth dogfish of Pacific and Indian Oceans and Red Sea
         having white-tipped dorsal and caudal fins [syn: whitetip
         shark, reef whitetip shark, Triaenodon obseus]
    2: large deep-water shark with white-tipped dorsal fin;
       worldwide distribution; most dangerous shark [syn: whitetip
       shark, oceanic whitetip shark, white-tipped shark,
       Carcharinus longimanus]