Meaning of pistol shrimp in English:
pistol shrimp
noun
Any of various marine shrimps of the families Alpheidae and Crangonidae (infraorder Caridea), having one enlarged chela which can be snapped shut with a loud concussion used for defence and for stunning prey; also called snapping prawn, snapping shrimp.
Origin
1930s; earliest use found in American Midland Naturalist.
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