Though called "killer whales" sometimes, orcas are the largest of the dolphin family. Readers want to know more about these high-interest animals, and this inviting book has the facts they'll love to learn, such as what they like to eat and where they live. Accessible and at-level text is supported by beautiful photographs, fun fact boxes, and interesting sidebars that offer more in-depth information. A concluding quiz allows young marine biologists to check their understanding as well as reinforces curricular content.