An alpheid is a member of the Alpheidae, a group of aroud 600 species including the pistol shrimp.
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YES! The pistol shrimp (Alpheidae) IS the loudest animal. They clap their claws together, which can break another shrimp's shell. Captured Pistol shrimp have been known to break the glass of their aquarium. They also interfere with sonar.
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