Why do rays need round tanks? I've never seen a round home aquarium however I have seen a great deal of rays in home standard large rectangular aquariums so I'm intrigued as to why they 'need' round tanks?Even if the tank was big enough, i would advise agaist a ray unless the tankis round.
There's no need for them to swim up onto their sides in order to turn round, they're able to follow the edge without the struggle of having to turn constantly