A forum for the discussion of saltwater reef aquaria, fish fish only aquaria, and diving. Also includes a classifieds section and photo albums.

Canadian reefing online community where one can discuss and chat with hobbyists of all levels from beginner to advanced.

Contains forums, galleries and calculators, as well as fish and coral databases.

Marine fish and reef aquarium discussions. Includes FAQ, picture gallery, chat room, articles and links.

General-interest forum for marine aquarists.

Message board and mailing list for Ohio marine hobbyists.

Forum for Vietnamese hobbyists that keep reef tanks and saltwater aquariums.