This just happened last night...I switched all the contents from mt 55 gallon tank to a 54 corner yesterday. I put a new sandbed in the corner tank and, all day yesterday, was tranfering water,rock, and coral and such from tank to bucket, tan to tank, bucket to tank and so on. I snagged my fish and kept them in a bucket until the new tank was ready. All went well and at 5 pm the transfer was complete. Fast forward 4 hours later when I decide to look in the old tank and find a couple of rogue crabs still alive in the 1 inch of wet sand that remains. I then pull a piece of rock rubble out of the sand and I almost have a heart attack when a fish comes flappin out of the sand! In all the confusion I forgot about my christmas wrasse! I just grabbed him with my hands and ran to the new tank 10 feet away! He hid in the rocks for about a half hour, but I am happy to report he seems no worse for the wear. Four hours in 1 inch of wet sand! So if someone wants to make a wager on the hardiest fish? Don't bet on your clowns. You bet your wrasse!