The oceanic whitetip shark is infamous for attacking shipwreck survivors. On land, packs of feral dogs are becoming a serious threat to human life.

The boa constrictor crushes the life out of its victims and the bullet ant's sting is painful, but the assassin caterpillar lives up to its name.

A friendly-looking but deadly seal prowls the frigid waters off the tip of South America. The recluse spider's sting is painful, then rots away flesh.