Crayfish
WordNet
noun
(1) Large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters
(2) Small freshwater decapod crustacean that resembles a lobster
(3) Tiny lobster-like crustaceans usually boiled briefly
(4) Warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California