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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Crab, lobster or shrimp:

CRUSTACEA: Lobsters, shrimps, crabs.
DECAPODS: Shrimp, lobster, crab, etc.
DECAPOD: Crab, lobster or shrimp