- American Livebearer Association
 - Provides newsletter, classifieds, photo gallery and more. - Australia New Guinea Fishes Association (ANGFA)
- Promoting the conservation, study, and propagation of the native species.
- Center for Limnology - University of Wisconsin at Madison
- Established in July 1982 to plan, conduct, and facilitate inland freshwater research.
- Desert Fishes Council (DFC)
- Working to preserve the biological integrity of desert aquatic ecosystems and their associated life forms, report related research and management endeavors, and disseminate information.
 Irish Char Conservation Group
- Dedicated to the conservation of arctic char, salvelinus alpinus, in Ireland.- National Geographic: Megafishes Project
- National Geographic project to document and understand megafish, large freshwater fish.
- Native Fish Australia
- Volunteer organisation that is open to anyone who cares about the well-being of Australia's native freshwater fish and the rivers, streams and other waterways that they inhabit.
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