The Aquarium. The Aquarium is a default in-house item that shows a Clownfish in it. If you click on the Aquarium, you are given the option to play the CrowdStar game Happy Aquarium. See AlsoEdit Happy Aquarium Wiki - For more information about the game Happy Aquarium. Gameplay Retrieved from "https://happypets.fandom.com/wiki/Aquarium?oldid=4482" Categories: Gameplay Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.