Marine biology is the scientific study of marine organisms and ecosystems in the ocean and other saltwater environments. This field encompasses a wide range of disciplines, including ecology, physiology, genetics, and conservation biology. Marine biologists study the behavior, morphology, and physiology of marine organisms, as well as their interactions with each other and their environment. Research in marine biology also focuses on the conservation and management of marine species and ecosystems, as well as the impact of human activities on ocean health. Marine biology plays a crucial role in understanding and protecting the biodiversity and ecological balance of the world's oceans.