The one thing that stumbles my thoughts is the creation of devils in the smiley fruit. Although it allows the users body to alter zoan types if there are no devils residing it offers the ability to have both a devil and artificial fruit. Though this means no awakening within that smiley fruit. If that's the case it may make the arficial types able to swim. Considering how they were created. Harvest from trees, It's made through SAD which is a liquid less dense than water originally a gas formed to liquid. Luminous Flowers providing it controlled heat tempatures. Can't be eaten unripe. 10% are acceptable. My thought is that they do have devils. but they reside in the seed of the smiley fruit they are like test tube babies being injected fruit. The formula SAD is a type of food in the water that the trees absorb for the devil to continue development and the heat for stable a environment. The fruit can't provide a paticular animal. Accept for the ones that were in Caeser's lab. Making the dragons. I havn't seen anything past the anime so please don't be upset at me if I'm totally wrong.