This document summarizes key facts about crayfish. It notes that crayfish are found in wet places like Texas, Mississippi, France, Spain, the United States, Mexico, and China. Crayfish have claws, antennae, a head, and a tail for speed. They eat things like slugs, dead fish, insects, and algae. Crayfish are eaten by most fish, alligators, humans, and otters. Crayfish come in different colors like blue, red, orange, and white, with red being the most common. The document does not provide a clear reason for choosing to focus on crayfish.