Crustaceans

Priapulids, sometimes called penis worms, were fearsome predators of the Cambrian Period. They may have worn shells for protection, new fossil evidence suggests.

Following a monsoon, hundreds of 'dinosaur shrimp' emerged for a few weeks in the Arizona desert.

Larvae punch slower than adults can, but still strike far faster than their prey can swim.

When mantis shrimp find a burrow that's just right, they'll fight brutal battles to steal it.

It had a boomerang-like head shield and dozens of legs studded with daggers.

Enormous and powerful coconut crabs are known for their extreme size. They also have an unexpectedly diverse "vocabulary."

Researchers found that baby Dungeness crabs living in the most acidic coastal waters are smaller, weaker and at risk of losing their shells.

As any lobster connoisseur knows, this crustacean turns bright red when it's heated. Why does this dramatic color transformation happen?

As if preparing for battle, some shrimplike creatures suit up in aluminum armor to survive the ravages of the deepest part of the oceans, a new study finds.

An ancient crab that lived during the dinosaur age was so strange, paleontologists are calling it the platypus of the crab world.