Georgette Douwma / Thorny oyster (Spondylus varians), pattern of mantle. North Sulawesi, Indonesia.
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Linda Pitkin / Variable thorny oyster (Spondylus varius) Rinca, Komodo National Park, Indonesia.
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Pascal Kobeh / Necklace starfish (Fromia monilis) on variable thorny oyster (Spondylus varius), Maldives, Indian Ocean. This starfish is a predator of oysters.
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Pascal Kobeh / Close-up of a Variable thorny oyster (Spondylus varius / varians) on a coral reef, Maldives. Indian Ocean.