do you mean a frog that is as aquatic as a FBT? if so then im sure there are many. none that i can really think of. It sounds like you are trying to find a tank that you can mix diffrent species in. You are going to have to find some species you like and then reasearch them to see whos compatible. Most likely you are going to have to redesign you tank or get bigger one assuming your tank is 10 gallon or something.