Our mission is to bring together people of all ages and walks of life, in the Southern California region, who are passionate about fresh water fish keeping. We have and serve the beginner to advanced hobbyist for the purpose of education and camaraderie. 

California’s Organization of Aquatic Show Tropicals is a not-for-profit organization that was officially registered in the state of California in 1991. We have founding members that have been meeting regularly since 1977, sharing their experiences with various species of fresh water fish, invertebrates, crustacean, and the plant life within the environments of the fish species we keep.