Blue Fins~BOOK REVIEW~

Jen and Rick are on the beach.They are swimming and surfing.
Jen sees a sea - urchin.Suddenly she sees a dolphin who can't swim because he is in a net.Jen helps him then she returns to beach.Next day they are in there.Unfortunately,the shark is swimming and Rick are dangerous.However,a blue fin helps him so he is safe.

I didn't go to sea a long time, and I have never played with a fin , so I envied this story.However I want not to see a shark.