Marine Biology (6th Edition) is a rare book at home and abroad that comprehensively introduces marine life and its environment. The author, Dr. Peter Castro, was fascinated by marine life during his field trip to coral reefs in high school and was determined to become a marine biologist. When Dr. Michael Huber was two years old, he caught his first salmon in a lake in Alaska, and aquatic life immediately fascinated him. The fascination with marine life made the two authors devote themselves to the study of marine biology. They are also keen to introduce marine biology knowledge to all kinds of marine life lovers and enhance readers' interest in marine biology. Yunxiang Mao and other teachers are professors of marine biology at China Ocean University.