The Baltic Marine Biologists http://www.smf.su.se/bmb/
An international non-governmental scientific organization whose aim is to promote studies on the biological diversity, structure, function and sustainable management of the ecosystems of the Baltic Sea Area (the Baltic Sea, Belt Seas, Öresund and Kattegat).
The North American Native Fishes Association http://www.nanfa.org/
Group's goal is to bring together professional and amateur aquarists, educators, students, anglers, fish and wildlife officials, and researchers in conservation efforts of the inhabitants of lakes and streams.