aquāˈrian adjective

Of or relating to aquariums

An aquarist

aquāˈrist (or /akˈwə-/) noun

A person who keeps, or is curator of, an aquarium (also (now obsolete) aquārˈiist)

Aquarius /ə-kwārˈi-əs/

1. The Water Bearer, a constellation giving its name to, and formerly coinciding with, a sign of the zodiac (astronomy)
2. The eleventh sign of the zodiac, between Capricorn and Pisces (astrology)
3. A person born between 21 January and 19 February, under the sign of Aquarius (astrology; pl Aquāˈrius or Aquāˈriuses)

Aquarˈian noun and adjective

(relating to or characteristic of) a person born under the sign of Aquarius