Many years ago, I worked for a prominent airline in STL. We shipped/transfered fish by the thousands every week. Those boxes got tossed and slid in the bay just like any other piece of luggage. That being said though, I never had one break open or bust that wasn’t already damaged. If you were to actually witness this in action, you would think for sure they would all be dead. You would also know why your luggage handles, wheels, etc. were damaged. Most people have no clue to how little time you have to load a plane.