Predict if a coelomate or an acoelmate would be larger

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.