Marine mammals are a diverse group of animals that have adapted to life in the ocean. They include species such as whales, dolphins, seals, sea lions, and manatees. Marine mammals have a number of unique characteristics that allow them to thrive in marine environments, including adaptations for swimming and diving, specialized feeding behaviors, and complex social structures. Research on marine mammals encompasses a wide range of topics, including their physiology, behavior, ecology, conservation, and interactions with humans. Scientists study marine mammals to better understand their biology and behavior, as well as to develop conservation strategies to protect these animals and their habitats.