Heather Moore Niver 
Viaje dentro de un arrecife de coral (A Trip Through a Coral Reef) [PDF ebook] 

Amazing ecosystems are often hidden just below the ocean’s surface. A coral reef is teeming with life, and readers will explore that life with the help of a special ship that takes them up close to the fish, coral, and other creatures that call a coral reef home. From the formation of the reefs themselves to the bacteria and plants that help keep the reef healthy, readers will learn everything there is to know about the amazing and colorful creatures that make up one of the world’s most diverse ecosystems.