Kujira no Josephina

Japanese Title: くじらのホセフィーナ

English Title: Josephine the Whale

Plot
Santi is a shy Spanish boy who keeps a tiny whale in a bowl, invisible to everyone but him. The whale, named Josephina, is able to alter her size and fly; she takes Santi on many dreamlike adventures and helps him confront the challenges during his childhood; however, things change as Santi starts taking interest in the outside world and gets to know his distant father.