I read “Blue Fins” from MACMILLAN READERS. You can find information about this book on page 88 in the Orange book. In this book, a girl called Jen and her friend, Rick come to beach and having fun. When Jen is snorkeling, she find blue dolphin in the net. The net is round the dolphin’s body and dolphin cannot swim. So Lia break the net and help dolphin’s life. Next day, when Jen and Rick is swimming, the hungry shark come to there and almost killed but at that time, dolphin which helped by Lia come to them and help Lia and Rick’s life! It was awesome story!
Axten, Sarah. (1992). Blue Fins. MACMILLAN READERS