Almost any large shark, roughly two meters or longer in total length, is a potential threat to humans. Three species, however, have been repetitively implicated as the primary attackers of man: the white shark (Carcharodon carcharias), tiger shark (Galeocerdo cuvier) and bull shark (Carcharhinus leucas). All are cosmopolitan in distribution, reach large sizes, and consume large prey items such as marine mammals, sea turtles, and fishes as normal elements of their diets. These species probably are responsible for a large portion of "bump and bite" and "sneak" attacks. Other species, including the great hammerhead (Sphyrna mokarran), shortfin mako (Isurus oxyrhynchus), oceanic whitetip (Carcharhinus longimanus), Galapagos (Carcharhinus galapagensis), and certain reef sharks (such as the Caribbean reef shark, (Carcharhinus perezi) have been implicated in these style of attacks. We know less about the offending parties in "hit and run" cases since the shark is seldom observed, but it is safe to assume that a large suite of species might be involved. Evidence from Florida, which has 20-30 of these type attacks per year, suggests that the blacktip (Carcharhinus limbatus) [possibly spinner (Carcharhinus brevipinna) and blacknose (Carcharhinus acronotus)] sharks are the major culprits in this region.