Book review2-4

I read "Orca". Story: When Tonya and her friends decide to sail around the world they want to see exciting things and visit exciting places. But one day, they meet an orca - a killer whale - one of the most dangerous animal in the sea. And life gets a little too exciting.
I don't know that orca is one of the most dangerous animal in the sea. I like orca but I read this book I thought that despite appearances, orca is scary life and they live in scary place.