Atrax is a genus of spiders. They have very strong venom. These spiders aggressively defend their territory and chase off attackers who may scare them by making a threat display. Next they will bite. The fastest death occurred in 1927 when a young boy died within fifteen minutes of being bitten. Thirteen deaths were recorded in the fifty years before antivenom was invented for this spider's bite. In English they are sometimes called Sydney Funnel Web spiders because they come from around that part of Australia.