According to everything I've seen about the "Spotted African leaf fish" or Leopard Ctenapoma, they only get 5 to 6 inches max.
Mine is 5.5 and grew from about 1 inch to this size in about one year in a 150.
Nothing in mu tank bothers him, and he will bully african cichlids anytime he feels frisky.
Im wondering if the person who said theirs is 7 inches, doesn't actually have a different species of "leaf fish"
I'm betting the LC will do fine with dats until/unless the dats get significantly larger in time.
I must say though, my LC has to be my favorite fish in my tank. As much as I like the sturgeon, Indli, and Clown knife, the scrappy little LC has the best personality and quirkiness of all combined. I love to watch him ambush his prey.