Shipping upside down is mainly how many wholesalers and myself sell coral at least those with a base. Those that do not have a base simply use a bag loosely folded around the coral and then double bagged, The bag that is used to fold around is NEVER opened but just cradles the coral so that if it has sharp edges , the bag prevents this from happening. As for corals with a base, make sure that there is enough water in the bag and enough air out of is so that the coral does not turn over and then have a coral out of water. Double bag it so that if it infact has sharp points, it will not puncture the bag as well. If they are loose frags, tieing them in just water with little air is okay too. as long as it doesnt have a tendency to OVER slime up which sometime can cause them to sufficate in their own slime. Use your best judgement and if you have to go the extra mile to see that it is wrapped properly, do so....someone is doing the same for you.