The Largest and Smallest Fish

　　So far as the size of a fish is concerned, the largest seawater fish is shark fish. It can grow as long as 20 m in length. The smallest seawater fish is Pandak's goby, which is only 0.01 m in length; the largest fresh water fish are beluga and Chinese sturgeon, which are as long as 3 m and as heavy as 600 kg; the smallest fresh water fish is medaka, which is only 18-25 mm long and 2-5 g in weight.