Read more: 10 Things You Probably Didn't Know About Oysters There are a few types of Maryland blue crabs, each with its own unique characteristics. The male crabs, known as Jimmies, come in ...

The female fiddler crab has two small, symmetrical claws; the male has one small and one oversize. “The large claw is all about the initial attraction,” says marine biologist Zachary Darnell ...

These crustaceans have been misnamed for two reasons: First, they’re not true crabs, like blue crabs ... coming partly out of their shells so the male can transfer a sperm packet to the female ...