User:Elliewolsfeld/citing sources

Diogenes heteropsammicola is a species of hermit crab that lives within "walking corals" of the genera Heterocyathus and Heteropsammia. "Obligate mutualism is a climax of co-evolution between symbiotic organisms." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5606932/



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.