A photo: A beaming child runs through a whimsical landscape, walking a giant self-luminous deep-sea creature that floats in the air above the child and is connected to the child by a leash. The leash extends from the child's hand to the fish's collar. The self-luminous deep-sea creature looks like a real live glowing deep-sea fish, a fascinating self-luminous deep-sea creature. Bright sunny day. The picture should look as if the child is taking his pet (self-luminous deep-sea creature) for a walk. Blue sky. Blue hour. Background: Milky Way.