The ocean fascinates readers of all ages. While young students may have an understanding of what oceans are, they may not be familiar with the adaptations creatures need to survive in these watery worlds. This title engages students in learning about ways animals have adapted to living in the extreme conditions of the ocean depths. These animals known as extremophiles include the giant squid which sports eight arms and two long tentacles for feeding and the fangtooth fish that has a dark coloring to blend into its surroundings. This title includes fact boxes and questions that motivate readers to make connections, vivid full-color photographs of astonishing aquatic life, and an interactive drawing activity to spur creativity. Complete with a glossary to enhance reader vocabularies, this title is sure to keep young readers enthralled in content that aligns with elementary life sciences curricula.