aquatic fauna; aquatic animals
Refers to animals living in water, often used in contexts like aquariums or ecology. Not a common everyday word; more likely to appear in written or technical descriptions.
You can see various aquatic animals at the aquarium.
aquarium (building)
aqualife park; aquatic theme park
Compound of 水 (water) and 族 (tribe, family), literally 'water tribe'. The exact historical derivation is uncertain, but the term follows a common pattern for classifying groups of organisms.