IPA: /əˈkwɛr.i.əl/
KK: /əˈkwɛrɪəl/
Relating to an aquarium, which is a transparent container for keeping aquatic plants and animals.
The aquarial environment in the tank is perfect for the fish and plants.
Aquarial is formed from "aqua" (from Latin "aqua", meaning water) and "-ial" (a suffix meaning relating to or characterized by). The word "aquarial" refers to something that is related to or characterized by water.
Think of 'aqua' which means water, and remember that 'aquarial' describes something related to water.