British Marine Life Study Society
Homepage of the British Marine Life Study Society, devoted to study of the marine wildlife of the North-east Atlantic.
Pacific Streamkeepers Federation
A non-profit society helping streamkeepers take action through support, education, and building partnerships
South Florida Aquatic Plant Management Society
Non-profit organization with interests in aquatic weed and plant management, growth of aquatic plants, and restoration of wetlands.
Southern California Association Marine Invertebrat
Promotes the study of marine invertebrate taxonomy in southern California. Site has extensive information on marine biota, zoology, and taxonomy.
The Baltic Marine Biologists
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
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.