This Shrimp Packs a Wallop

There might be a fish called the Jack Dempsey, but this mantis shrimp could knock him into next week.

The crustacean imported from Bali, with its outer-space alien face, has powerful claws that it uses to attack and kill prey, including snails. Carleen Webb, one of the owners of Just Fish in Bear, says you can hear it crack a snail's shell. That power means that fish fans need to keep it in an acrylic tank; it's been known to break a doubled-paned glass one.

Webb says the mantis shrimp ($89.99) -- just a few inches long -- is popular among fish owners as the focal point of a separate exotic tank. "When they see people, they come right at them," she says. "They're curious."

Creepy, but cool.