I can totally tell with my clowns. The blacks are ora but the regular ones are just wild caught. The wild caught ones were the first to host my coral and they seem to be nippy with each other while the other set isn't and they are bigger and older.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.