Sand Bubbler Crabs at Cape Tribulation 8 – Small ball-shaped sand pellets produced by the feeding activities of the Sand Bubbler Crab (Scopimera sp.) on the beach at Cape Tribulation in Queensland, Australia. They are shown here with a small gastropod shell of the Common Spirula or Ram’s Horn (Spirula spirula) with two minute goose barnacles attached.
Jessica's Nature Blog 