The term CRAYFISH RELATIVE can be solved by the seven-letter word LOBSTER. Lobsters are a type of crustacean, related to crayfish, that live in saltwater and freshwater habitats. They are typically found in the Atlantic Ocean, but can also be found in the Pacific and Indian Oceans. Lobsters have two large claws, which they use to catch prey and defend themselves. They are a popular seafood dish, and are often served boiled or steamed.