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

Crossword clues for It has seven pairs of legs:

ISOPODS: Freshwater crustaceans with seven pairs of legs
ISOPOD: Crustacean with seven pairs of legs.
ISOPODS: Crustaceans with seven pairs of legs
ISOPOD: It has seven pairs of legs