Coralite refers to a mutualistic relationship between certain species of coral and sea anemones. 
In the coralite relationship, sea anemones attach themselves to the hard exoskeleton of the coral. They typically occupy spaces between the coral branches or settle on top of the coral colony. The sea anemones gain protection and a stable substrate provided by the coral, while the coral benefits from the presence of the sea anemone in several ways.
This is my version of their relationship.