Live Science has a list of the top ten deadliest animals. Click here to read the full list or scroll down to see a few selections.
Poison Dart Frog
Australian Box Jellyfish
Also known as the sea wasp, this salad-bowl sized jellyfish can have up to 60 tentacles each 15 feet long. Each tentacle has 5,000 stinging cells and enough toxin to kill 60 humans.