My concern is from the perspective of a PAX who has no desire to see a creature made to exist in an alien atmosphere. To be cought, trapped, tied down and then subject to changes in air pressure, water and every other aspect that it has known strikes me as cruelty in the extreme.
I may not be able top prevent people behaving in such a callous fashion but I do not wish to be in their presence, or the captured creature that I would not be able to assist.
I think that transport of live animals (land or sea dwelling) should be stopped. Please note that I am not vegetarian but this forced transport under these conditions shows humans to be a base creature.