In tank 7 there is a striped killy fish. The killy is small and looks kind of brown and it swims pretty fast. like the flounder it eats a small piece of squid. like the flounder i feed it and fill up its water supply.
My tank has one flounder in it. It is very fast it and its a smooth sandy color, it is also flat. The flounder eats a small piece of squid ever Monday and Thursday. Personally I feed the tank and fill its water back up.