@Thorvald: Maybe they are his pets ;)
Koi Tank by @JediPrincess (Jedi Princess)
On May 5th in Japan they celebrate Children's Day (Originally Boys Day). It's a holiday to celebrate the health and future success of children. The symbol of this holiday is a Carp, thus inspiring this picture.
I see those faces and think of Wen the Eternally Surprised from Discworld. :P