Also referred to as crawdads, crayfish, or mudbugs, crawfish aren't fish at all—they're crustaceans that live in fresh water, like rivers and marshes. Slightly sweet, they taste like a cross between their cousins, lobster and shrimp.

Crawfish also contain a good amount of B vitamins, as well as iron and selenium — important minerals that can be hard to get through your diet. "The only drawback to crawfish is that they do contain some dietary cholesterol," says Snyder. "But ultimately, crawfish are an overall healthy source of protein."

You can safely eat all the meat in the body of the crawfish, as well as the head. Most people avoid eating the shell, tail, and antennae. If any crawfish died before boiling, you should test the meat for safety. Mushy meat should be avoided.

A crawfish is a crustacean that looks like a small lobster, measuring between three and six inches long. They have a hard protective exoskeleton and a total of 10 walking legs with the front two as larger claws, just like lobsters and crabs.