Cetology is the scientific study of whales, which includes their anatomy, behavior, and ecology. It is a branch of zoology that focuses on the study of cetaceans, which are aquatic mammals such as whales, dolphins, and porpoises. Cetologists use a variety of methods to study whales, including observation, tagging, and genetic analysis. Cetology also involves the study of whale populations, migration patterns, and the effects of human activities on whale populations.