oceanic whitetip shark

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a large pelagic shark, taxonomic name Carcharhinus longimanus, characterized by the white tips on the fin, often prone to attack humans.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large deep-water shark with white-tipped dorsal fin; worldwide distribution; most dangerous shark