jimk said:I don't believe that they get that big so you could probably keep one in a 20 gallon.
can you tell if the fish is a male or a female? Will they mate in a tank?Miles said:They can get up to 6" and they put off alot of waste.. The minimum reccomended tank size for just 1 as an adult is 50g.. When they get bigger, flakes and other foods won't suffice, and you will have to switch to a diet full of meaty seafoods such as Krill, Silversides, Crayfish, Squid, Crab, Lobster, Cockle, Shellfish,etc..