What methods of movement of animals can be used only in the aquatic environment, and which in different?

Life in the aquatic and terrestrial environment is very different, therefore, animals that live in a particular environment have adapted to comfortable movement. Thus, in the aquatic environment, the modes of movement are flagellar or with the help of cilia. In a terrestrial environment, they move with the help of muscles. There are animals that can move both in water and on land. For example, frogs and crocodiles. These amphibians are able to live in water and on land, move quickly enough and can stay in water for a long time without oxygen.