The term "water-dwelling" is often used to describe animals, plants or objects that live or are found in water. Synonyms for this term include aquatic, marine, amphibious, subaqueous, subaquatic, pelagic, fluvial, lacustrine, riverine, and littoral. An aquatic animal, for instance, refers to a species that lives predominantly in water, whether it's in a lake, river, sea, or ocean. Marine creatures, on the other hand, live specifically in saltwater environments. Subaqueous means beneath the water's surface. Pelagic refers to living or growing in the open sea or ocean. Each of these synonyms captures a slightly different nuance of living in or near water.