Breeding
Breeding Rosy Barbs and Swordtails, Breeding Tropical Fish, Freshwater Fish in Aquarium, Mike Edwardes Tropicals, Sue & Craig's Fishroom
Chats and Forums
Aquamaniacs, Arowana Discussion Board, Fish Junkies, Fishy Forum, KC's Fish Forum And Chat, Koi-Bito Discussion Board, MollyMan.com, Oscarfish, The Sydney Cichlid Page Forums, Yahoo Groups: A Betta World
Fishrooms
Aquajournal, AquariumFish, Arjan's Aquarium Site, Browny's Cichlid Site, Chris' Aquarium Page, Chris's Aquaria Page, Chucks Planted aquaria, Disky's Freshwater Aquaria Homepage, Don's Aquaria, Fred's Aquarium
Foods and Feeding
Brine Shrimp, Feeding of Fish, JPS - Tropical Aquarium Stocking and Feeding, Live Foods Mailing List
Health
Algae-control.com, Aquarium Diseases, Diagnostic Guide to Identifying Disease among Gold, Disease Index and Treatment, Diseases and Medication of Angelfish, Fish Diseases FAQ, FishDoc, Fishy Farmacy, Freshwater Fish Diseases and Treatments, Koi Vet
Species
Arowanas, Botias and Loaches, Catfish, Characins, Cichlids, Goldfish, Invertebrates, Killifish, Koi, Labyrinth Fishes
All About Fish
Offers information on tank setup, and how to care for it.
Aquaria - by Patrick Timlin
Provides species, lighting, and tank related information.
Aquarium Guru
Offers advice on breeding, health care, and tank setup.
Aquarium Hobbyist
Message boards, live chats, and an index of a variety of related sites.
Aquarium Tropicana
Articles on setup, maintenance, diseases and accessories. Contains fish species, forum and links.
Aquariums and More
Offers information about fish, plants, and caring for your aquatics.
Aquariums at Pet Resources
Articles on general-purpose and specialized setups, species profiles, and a bibliography.
Aquatic Fanatic
Offers information about UK based store as well as routine maintenance, diseases, water chemistry, and plants.
Aquaworld
Basic fishkeeping, fish profiles, plant listings, disease section, tips and tricks.
Auspet.com: Fish
Offers glossary, compatibility chart, disease information, conversion chart, and beginners guide.
Badman's Tropical Fish
General care and species-specific information. Largely graphical site.
Bala Shark Bay Aquariums
Tips for beginners, information on treatment of a few diseases, and information about the Bala Shark.
Beginner Aquarist
Discusses the care of a tropical fish tank or betta bowl. Also offers information on water quality and diseases.
Beginners Tropical Aquarium
Information for beginners discussing water, feeding, breeding, and plants.
DaFishDude.com
Offers information and pictures to assist with tropical fish questions.
E-aquaria.com
In-depth articles on the natural history and care of various species uncommon in the hobby as well as aesthetic design of aquaria, plant cultivation, automation, and disease.
Eric.Petfish.Net
Fishkeeping basics, pathology and treatment of common diseases, and a section on Endler's Livebearer.
Evalife Aquarium
Includes a database of species and articles on breeding, disease, and keeping cichlids.
First Tank Guide
Beginner's guide to setting up a new aquarium. Form allows you to send questions to an experienced aquarist.
Fish in the .Net
Interactive site with a wealth of information about tropical fish.
FishWeb
Catalog of information on tropical fish and plants with some photographs.
Fishzine Freshwater Aquarium Website
Includes a message board, picture gallery, webzine, product reviews.
Freshwater Aquariums on About.com
Species, beginner, do it yourself, and general information.
Lisa's Lair
Offers profiles and spawning reports for various species including cichlids, rainbowfish, livebearers, catfish, and others. Also includes some aquarium plant profiles.
My Fish Help Page
Articles and information aimed at novice fishkeepers.
Our Simple Joys: Freshwater Aquaria
Articles on many beginner and advanced topics, tutorials, and digital photos.
Petfish.net
Articles, tips and links. Dedicated to making fish keeping fun and simple.
Popular Freshwater Tropical Fish
A comprehensive guide for first-time aquarists with sample setups.
Randy's Aquaria
Features a variety of articles by Randy Carey aimed at the serious aquarist including identification, species, fishroom automation, keeping of aquariums, and breeding. Photo galleries and product reviews included.
Ryan's Tropical Fish Information Site
Profiles of commonly kept species, along with aquarium basics, a gallery of drawn or painted fish pictures, and bulletin boards.
Shtinkypuppie's Fish Site
Info on several fish species, basic fishkeeping, disease index, links.
The Aquarian's Net
Fish compatibility, photos, equipment reviews, clubs, forums, discounted equipment.
The Art of Fishkeeping Made Simple
Articles covering choosing a shop, buying equipment and fish, cycling, feeding, cleaning, algae and diseases. Also contains pictures and links.
The Fish Bowl
Information on a wide number of fish, and basic tank setup for beginners.
The Fishtank Crew
Message boards and articles on the basics of tank setup, including an article on the nitrogen cycle and the fishless-cycle method.
The Native Fish Conservancy
Information for anyone interested in North American native fish. Also home of an exotic fish removal program, through which you can buy plecos and cichlids.
The Skeptical Aquarist
Includes in-depth articles on fish species, communities, feeding, plants, water, aquaria setup, aquascaping, algae, health and disease.
The Tropical Tank
Brief notes and photos of fish (including some uncommon species), product information and reviews, tank setups, and miscellaneous articles.
Tropical Aquarium Setup Information
Articles on setup including discussions of equipment, filtration, cycling, aquascaping, stocking, and feeding.
Tropical Aquariums
Includes an index of fish (with photos), tips on basic care, articles, and an equipment guide.
Tropical Fish - A Relaxing Hobby
Basics of aquarium set-up and maintenance.
Tropical Fish Centre
Information on tropical fish species, intended to help beginners identify and care for their fish.
Tropical Fish Focus
Beginners guide to tropical fish keeping.
Tropical Fish Forever
Contains a forum, fish index, articles on breeding, information on fish diseases, and a beginners section.
Tropical Fish Forum Homepage
Features fish chat board, photos and profiles of commonly kept species, and basic disease treatment instructions.
Tropical Fish Keeping
Information on setting up and maintaining a tropical tank.
Tropical Fish Webpage
Information about aquaria setup and care, and diseases.
Tropical Freshwater Aquarium Fish
Species profiles, the essentials of water chemistry and nutrition, and a guide to fish health.
Wizzkid's Fish Tank
Features tank pictures, aquarist archives, FAQs, equipment, and chemical information.
Xoles' Fishies
Aimed at novice fishkeepers, articles include setting up, maintenance, common problems, medications, product reviews and a forum.