125gallon freshwater stocking?

125 gallon stocking ideas? i am getting a 125 gallon i live in georgia i want to get a 3 to 4 inch arowana and get rid of it when it gets to about 8 inches i also am going to put a oscar and a severum in there i want stingrays but they are illegal in georgia but this link says they can ship them to georgia im confused any other fish suggested that will work in my tank here the link http://www.petsolutions.com/C/Live-Freshwater-Fish-Stingrays/I/Freshwater-Florida-Stingray.aspx p.s i know a 125 is a little small for one but when he becomes an adult i plan on moving him to my 500 fw tank