about 2 or 3 months ago i went to my local fish store to pick up a couple fish for my new 125 Gallon tank, I got a Red devil, Jack Dempsey,Albino Tiger Oscar and Tiger Oscar, as well as 2 Columbian Shark/Silver tip sharks 2 Common Plecos and 2 Golden Algae eaters. later that day i noticed in the back of the tank a very small maybe .5 inch fish, i looked south american to me so i left him to see what happened, none of the fish pick on him, though they are much bigger, infact he chases the algae eaters, i looked everywhere online to try to find out what he is, he is about 1.5 inches now and the closest thing ive seen is a baby dovii??? what do you guys think?