Single, but his tail and fins are long and froofy. More decorative than a standard goldfish, but all the same bad habits. He used to share a tank with a goldfish (who has since moved on to pond life), and in comparison he was slightly slower, which is why he's still in the tank. He's got very pale colouring which would make him a target for predators too, but OMG, I want him out of my tank!