Marine Mammals refer to a diverse group of mammalian species that have adapted to life in marine environments or depend on the ocean for their food. They are a subgroup of animals, specifically mammals, which include a variety of species from bats to herbivorous mammals. These animals exhibit unique characteristics such as streamlined bodies, specialized organs, and modified limbs to thrive in aquatic habitats. They play important roles in maintaining marine ecosystems and are often subjects of scientific study due to their adaptation mechanisms.