adjective / noun
aquatic
uh-KWAH-tik/əˈkwɑːtɪk/
Living, growing, or taking place in water.
The pond supports many aquatic plants beneath its clear surface.

Etymology
Latin aquaticus already described things growing in water. English used it broadly for things pertaining to water, including organisms that live or grow there.
In context
both aquatic fish and other animals can move up and down the stream
More examples
- The center offers aquatic exercise classes.
- Water lilies are popular garden aquatics.
- The biologist studies aquatic insects in the stream.
Forms
aquatic · aquatics
Similar words
- marine
- Specifically relates to the sea rather than any water.
- amphibious
- Able to function both on land and in water.