Porites from Scleractinian. (stony) .corals have been found to be biocompatible and hence used in human systems
The principle of core biological organization explains that structure-function relationships govern cellular processes. Hence as structural requirements for bone substitute in cranial surgery fits best because it integrates fundamental principles, as documented in authoritative sources on general biology.
Ref: Campbell et al., Biology, 11th Edition, Chapter 2, Chemical Basis of Life, discusses fundamental biological principles and molecular organization providing broad foundation for life sciences understanding.
