These Giant, Prehistoric Bugs Used To Rule The Earth. Be Very Glad It's Not That Way Today.

1.) Anomalocaris (a weird shrimp-squid)

1.) Anomalocaris (a weird shrimp-squid)

Anomalocaris's name literally means "abnormal shrimp," which is a pretty accurate statement. This underwater nightmare was 3 feet long and had a mouth filled with thorny fangs. It lived almost 500 million years ago.

1.) Anomalocaris (a weird shrimp-squid)