hmmm... there's probably an INFINITELY more humane way to do this...

i get that they're not killing them and they end up fine, but imagine the trauma of you, a mammal, going through a long ass tube, not knowing what's going to happen to you, and you can't breathe. 🤷‍♀️

They get misted with water throughout the thing, and it results in fewer injuries than the 'ladder' method. Also, it's a fish. It never knows what's going to happen to it at any point in time throughout its life.

"a mammal"