Ehh, I think this one's too far out. I mean, how are the corals supposed to spread their gametes? IRL corals do so in water, which greatly reduces the energy output of mating. I think you could revamp these from fauna to a more floral one. Maybe like cactuses but without spines, so they have to secrete a hardening mix of cement-like goo over themselves. Then, in a termite mound way, they provide a better climate inside so some very big ones could have their own ecosystems. How bout that?
Land Coral / Discussion
This is the discussion related to the wiki page Land Coral.