It is better than aqua cultured, although I've seen some nice aquaculture(Walt smith) I would buy it more for it's shape and conservation value than the organisms on it.
Quote:
Ultra Premium grade:
- Good coralline coverage, polyps, macro algae, sponges and other beneificial organisms.
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feather dusters are a given, and could have attached to the rock from their holding tank. sponges, polyps, and macro algae other than a sprig of caulerpa seem to be missing. I know that rock varies but when I think "ultra" I think of nicer rock than this.