Definition: Amphibium, literally meaning "water creature," describes a species that lives in both freshwater (riverine) and marine environments, typically relying on water for survival. This term encompasses many animals like frogs and fish that are not terrestrial animals. The term also has multiple meanings within the context of biology. Definition: Amphibial refers to a living organism, particularly those that live in or depend on aquatic environments. An example is the frog, which lives in freshwater habitats but can also be found in the ocean. Other examples include the jellyfish and many marine animals, including some fish species.