Bioclaustration is kind of interaction when one

organism An organism is any life, living thing that functions as an individual. Such a definition raises more problems than it solves, not least because the concept of an individual is also difficult. Many criteria, few of them widely accepted, have be ...

(usually soft bodied) is embedded in a living substrate (i.e. skeleton of another organism); it means "biologically walled-up". In case of

symbiosis Symbiosis (Ancient Greek : living with, companionship < : together; and ''bíōsis'': living) is any type of a close and long-term biological interaction, between two organisms of different species. The two organisms, termed symbionts, can fo ...

the walling-up is not complete and both organisms stay alive (Palmer and Wilson, 1988).

References

* * Ecology Ecology terminology Symbiosis Trace fossils {{ecology-stub