Greater Chicago Cichlid Association (GCCA)
- Calendar, club and membership information, and online tips and articles. Focused on the family Cichlidae, with particular emphasis on maintenance and breeding in captivity.
- http://www.gcca.net/

Chicagoland Marine Aquarium Society (CMAS)
- A nonprofit organization of marine hobbyists that promotes a better understanding of the life kept in marine aquariums. Includes monthly meetings, photos, guest speakers, coral propogation, newsletters, and related resources for marine aquarists.
- http://cmas.net/