You would be very surprised to know how many zoas being sold in the hobby these days are fresh out of the ocean, it's a much larger percentage than the largest percentage you're thinking of right now. If it's metallic type polyps and coming from a retailer the odds are not in favor of it being captive raised, pretty much the opposite... On the other hand it doesn't mean they'll have much of a tougher time adapting either, imo adaptation is pretty specific to the type of zoa, some are easy and some are melters.