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Definition of Signal crayfish
1. Noun. An American crayfish, ''Pacifastacus leniusculus'', having a large claw that it waves to attract a mate. ¹
¹ Source: wiktionary.com
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1. Noun. An American crayfish, ''Pacifastacus leniusculus'', having a large claw that it waves to attract a mate. ¹
¹ Source: wiktionary.com