I've seen a very fascinating and beautiful fish today at a nearest pet shop. The shopkeeper told me that it is a silver aruana. this fish is very rare in my city. I have never seen anything like this !!!! the fish was about two feet long!! it was costly too Tk. 50,000 (US$ 700)!!! I think it should be kept in public aquariums. the shopkeeper alsotold me that they live in South America.