The Calgary Aquarium Society (CAS) is a registered non-profit organization dedicated to the study and appreciation of aquatic life, established in 1951. With a mission to encourage the hobby of fishkeeping, CAS serves as a hub for enthusiasts looking to deepen their understanding and share their passion for aquatic ecosystems. The society offers a variety of programs and activities, including monthly meetings, auctions, competitions, and special events that foster community engagement and social interaction among members.

CAS also focuses on education and communication, publishing books, papers, and periodicals related to aquatic life and the hobby. Members are invited to contribute articles and artwork, enhancing the shared knowledge within the community. Additionally, the organization recognizes excellence through awards programs, including the Breeders Award Program (BAP) and Horticultural Award Program (HAP). With a commitment to promoting fishkeeping and aquatic studies, CAS stands as a vital resource and gathering place for both novice and seasoned enthusiasts in Calgary.