montereybayaquarium:

Need an underwater demolition expert? Meet the pocket-sized peacock mantis shrimp. Its claws can move so fast that they shatter clam shells—and generate light. Our latest podcast has more tales about this tiny terror!

I love these little dudes,
When I visited this aquarium I unashamedly crawled up into the little kid tunnels to see the peacock mantis . Worth it :)