Horseshoe clam (Hippopus hippopus) on sandy bottom, Namu atoll, Marshall Islands, Pacific

invertebrates horseshoe clam hippopus hippopus namu atoll marshall islands north pacific seabed eye pacific ocean bivalve clam claw invertebrate mollusc mollusca one animal day outdoors nature natural world marine life underwater clams shell shells horseshoe clams pacific sandy close up close ups horizontal