aquatic

nouns

a plant that lives in or on water
is a type of (narrower)
(botany) a living organism lacking the power of locomotion

adjectives

relating to or consisting of or being in water
"an aquatic environment"
pertains to
operating or living or growing in water
"boats are aquatic vehicles"; "water lilies are aquatic plants"; "fish are aquatic animals"
antonym
antonym
is similar to
native to or inhabiting the sea
"marine plants and animals such as seaweed and whales"
is similar to
partially aquatic; living or growing partly on land and partly in water
"a marginal subaquatic flora"
is similar to
growing or remaining under water
"viewing subaqueous fauna from a glass-bottomed boat"; "submerged leaves"