Boy and the Dolphin

When a boy helps free a dolphin tangled in a discarded fishing net, they develop an unexpected friendship.
"Once there was a boy who lived by the sea. He loved the sea and he swam in it every day he could ... which was most days. He was a very good swimmer. One day, the boy was swimming as usual when he noticed some splashing further out in the water. He decided to take a closer look."