Thanks for the earlier comments...
I have had most of my wet pets and LR for over 5 years through 3 different tanks.....money ?? !! dont ask, dont want to think about that part...haha
Most all corals can release toxins or slime when stressed/disturbed like in shiping, ect. Best to just do normal acclimation and by the time it done, most will be clean enough to place in the tank. Colt like most leathers will do this and also often do this dureing nomal life in a tank too. Its how they go to the bathroom. Its called shedding and its normal. Best to have a slighty brisk current in the area of leathers so as to help the coral clean off the shed.