The Magical Tale of the Little Mermaid's Tail

Do you know how mermaids got their tails? It all started in a magical ocean with the story of a little boy named Theodore. He really liked to collect fish. One day he caught a beautiful egg-pearl with a tiny creature inside. The boy took this wonderful creature home, but in the aquarium, it became weaker day by day. Fortunately, Theodore realized how to save his new friend. What do you think he did?