What's your favorite animal? In My Favorite Animal: Humpback Whales, students will learn amazing facts about humpback whales. Each My Favorite Animal book features interesting non-fiction at a 2nd-grade reading level paired with questions throughout the text to check the reader's comprehension. Sample Text: Although Humpbacks are mostly solitary whales they will hunt together. They often use the "bubble-net feeding" method. They form a circle 10-100 feet across and about 50 feet under the surface of the water. They blow bubbles from their spout while circling upwards towards the surface. This creates a curtain of bubbles that traps the fish.