"Cultivated coral" is exactly that. It is not harvested from the
wild, but rather from privately/commercially grown stock. I only use
cultivated or beach-found pieces when I use coral. It's what's used
in public and private aquariums world-wide. My husband used to breed
(rather a finicky process) it and there are industries that revolve
around it. Growing it, once bred, isn't difficult. A tank, salt
water and lights.