David Fleetham / Horseshoe clam (Hippopus hippopus) mantle, close-up. Philippines.
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GEORGETTE DOUWMA / Close up of exhalant syphon of Bear paw / Horse's hood / Strawberry clam (Hippopus hippopus) Misool, Raja Ampat, West Papua, Indonesia.
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Chris Newbert / Horse's Hoof Clam (Hippopus hippopus) mantle detail, Indonesia