A Reiquarium is a self-contained body of water containing Rei Ayanami and/or her clone(
s), a character from the anime Neon Genesis Evangelion -- be it a hot tub,
tank (see episode
23), swimming pool, pond, lake, sea, ocean, or water world.
Lengths of running water such as
brooks, creeks, streams, and rivers containing Rei Ayanami and/or her clone(s) ARE NOT Reiquariums because they are fed from and empty into self-contained bodies of water (see above).
Misato took the
three Children and Pen Pen on a vacation trip to Okinawa. While Misato, Shinji, and Pen Pen had fun on the
beach, Rei and
Asuka went SCUBA diving -- thus turning the East China Sea into a Reiquarium.
