What type of relationship do Sergei and the goldfish have? What evidence in the text reveals this? What does this say about Sergei? The fish swishes his fish tail back and forth in the water, the way he does, Sergei knows, when he’s truly excited. The goldfish can already taste freedom. Sergei can see it on him. After the last wish, Sergei won’t have a choice. He’ll have to let the goldfish go. His magic goldfish. His friend."Fixable," Sergei says. "I’ll just mop up the blood. A good sponge and it’ll be like it never was." That tail just goes back and forth, the fish’s head steady.