keyhole sand dollar images

A dead keyhole sand dollar (Mellita quinquiesperforata) at Gulf Specimen Marine Lab and Aquarium.

A dead keyhole sand dollar (Mellita quinquiesperforata) at Gulf Specimen Marine Lab and Aquarium.

A keyhole sand dollar (Mellita quinquiesperforata) at Gulf Specimen Marine Lab and Aquarium.

A keyhole sand dollar (Mellita quinquiesperforata) at Gulf Specimen Marine Lab and Aquarium.

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National Geographic Photographer and Speaker