North American Freshwater Fish
- Images, distribution maps and other data on North American freshwater fish.
- http://www.utexas.edu/tmm/tnhc/fish/index.html

Native Fish Photo Gallery
- Images of fish native to the north-central United States.
- http://www.nativefish.org/Gallery/

Fish
- Information from Wikipedia on the classification, anatomy, respiration and general biology of fish, and other aspects of their life.
- http://en.wikipedia.org/wiki/Fish

The Cyclostomes: Class Agnatha
- Outlines the characteristics of this class of primitive jawless vertebrates which comprises the hagfishes and lampreys.
- http://www.gma.org/fogm/Agnatha.htm

Freshwater fishes of Iraq
- A searchable database providing descriptions and illustrations of species found in Iraq.
- http://www.briancoad.com/main.asp?page=TitlePage_Iraq.htm

Freshwater Fishes of Iran
- A searchable database providing descriptions and illustrations of species found in Iran.
- http://www.briancoad.com/main.asp?page=titlepage.htm

Fishes of Canada: Annotated Checklist
- Attempts to provide a definitive listing of the scientific, English and French names of all Canadian fishes.
- http://www.briancoad.com/fishes%20of%20canada%20titlepage.htm

Fish, A Quick Course on Ichthyology
- Basic introduction to fish biology, by Odyssey Expeditions Tropical Marine Biology Voyages. Covers taxonomy, anatomy, reproduction, schooling behavior, how fish swim, how fish sense, and thermal strategies.
- http://www.odysseyexpeditions.com/fish.asp

Codes for Australian Aquatic Biota
- Species coding system for aquatic organisms in the Australian region. Includes standard English names for Australian fishes.
- http://www.marine.csiro.au/caab/

Discover Life - Fish
- Checklists, images, and identification guides for world fish.
- http://www.discoverlife.org/nh/tx/Vertebrata/Fish/

Hazardous Mediterranean Fish
- An illustrated guide by the late Dr. Louis Zammit, M.D.
- http://www.million1.com/hazardous/

Neotropical Fish Image Gallery
- Collections of photographs of fish species found in the tropical regions of the Americas.
- http://www.biocollections.org/imagegallery/

Gray's Reef Fish Guide
- An illustrated guide to the fishes of Gray's Reef National Marine Sanctuary off the coast of Georgia, USA.
- http://www.graysreef.nos.noaa.gov/fishguide.html

Key to the Fishes of Puget Sound
- Identification key and guide to all families of fishes in Puget Sound (Washington, USA).
- http://www.uwfishcollection.org/FishKey/

Marine Fish Fauna in Hong Kong Waters
- The first fish Internet database in Hong Kong.
- http://www.hk-fish.net/

Orðabók 7
- English index to nine-language fish common name dictionary. Find out what a particular fish is called in up to nine other languages. Also includes scientific names.
- http://www.hafro.is/ordabok/?op=list&wanted=7

Fish Classification: The Classes of Fishes
- List of all classes, orders, families, and genera of fish.
- http://cichlidresearch.com/fish_html/allfish.html

Find a Fish
- Australian Museum collection of factsheets on fish species. Listed by scientific or common name, or search the database.
- http://www.amonline.net.au/fishes/fishfacts/index.htm

FishBase
- Searchable global database containing information on 25,585 species (110,000 common names), 71,000 synonyms, 28,000 photos, and 21,000 references.
- http://www.fishbase.org/

Fish FAQ
- Fascinating facts about fish from U.S. National Marine Fisheries Service Northeast Fisheries Science Center.
- http://www.nefsc.nmfs.gov/faq/