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Marine biology is the scientific study of organisms that live in saltwater environments, including oceans, seas, and estuaries. This field encompasses a wide range of disciplines, including ecology, physiology, behavior, genetics, and conservation. Marine biologists study a diverse array of organisms, from microscopic plankton to large marine mammals, and investigate topics such as marine food webs, biodiversity, and the impact of human activities on marine ecosystems. Understanding marine biology is crucial for conserving and managing the health of our oceans and the many species that call them home.