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Walking Corals Hermit Crab
Diogenes heteropsammicola is a species of hermit crab that lives within "walking corals" of the genera Heterocyathus and Heteropsammia.



These coral have an internal cavity that is typically occupied by a symbiotic sipunculan worm ; in the crab's habitat in the Ōshima Straight south of Amami Ōshima, it is often found inside the corals instead.