Rich, here was our synopsis of getting the corals on the airline-- Overall a good experience:
We had to check the corals since they were in liquid. The ticket counter person asked us what was perishable in our boxes. She didn't blink an eye when we told her it was corals and she then proceeded to put extra tape on the boxes for us!.:rollface: Our luggage was too heavy to fit the styrofoam coral boxes, so the boxes went as a separate piece of luggage. We did have a some leakage which I believe was caused by the pressure changes and not by rough handling. The bags containing the corals were pretty taut so when the pressure changed I think it caused some of the bags to 'pop' and get holes in them, however each baggy still contained at least a little water. I'm not sure how to avoid this--thicker bags maybe. Regardless of this, the corals made it home safely and are doing great in our tanks