NEED HELP PET (frog) IDENTIFICATION (with photo)?

I bought this frog as a tadpole, it wasn't tiny like an endler or fish fry but it was about as big as a peanut with a shell. I thought it was an African dwarf frog or and African clawed frog but he doesn't seem to behave like one. He likes to sit on a floating log I provided him in my 55 gallon tank. I gave it to him noting how he seemed to like to be on the surface of the water or he seemed to be trying to stand on something. I was told he would be a filly aquatic frog but now that I see him always on that log I don't think so. His skin doesn't seem to dry out which leads me o think that he takes a dip once in a while. I leave food for him on the log as well however I never see him actually eat and I don't notice any food missing. You can see all his details in the picture provided. I should note that I also have a very sizeable Ryukin in the tank, the water is warm like 75-80f and I have 2 air stones blowing bubbles. I heard they don't like those so I think that might be the reason he doesn't want to be in the water. I did try to move him to a smaller tank fit for Berta fish but he did the same behavior of stayin to the top and seemed to prefer being on my hand j stead of in the water. I do use water conditioners (API stress coat) to make the tap water safe. What is wrong with my African dwarf frog if he even is one? Is he sick? Or is he just a different kind of frog? He is also not very big probably just and inch in size.