User:LazyFish45/citing sources

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

Diogenes heteropsammicola in a walking coral (left) and swimming freely (right)

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. hoiou

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References

1. https://nationalzoo.si.edu/animals/news/how-do-you-build-home-for-hermit-crabs#:~:text=Contrary%20to%20popular%20belief%2C%20hermit,can%20choose%20where%20to%20wade.