Sharks. Crocs. The prehistoric killing machine types.
Sharks---not unless you get into waters with the maneaters=not that much of threat
Crocs=same thing...
Bears are both on land and sea (Polar bears), and they can run faster than humans
One defense, there was a man on Kodiak Island, who laid drunk in the middle of the road overnight. There were tons of bear tracks around him, yet nobody could figure out why they never touched him. Then "it" them....he had beans that night
