Checklist of Marine Fishes of Turkey

General taxonomical information on the marine fishes inhabiting Turkish seas: Black Sea, Sea of Marmara, Aegean Sea, and Mediterranean Sea.
http://bornova.ege.edu.tr/~mbilecen/

East Coast Fish-Watch Project

Designed to help people to learn more about South Africa's marine fishes and how to identify them.
http://fishwatch.tripod.com/

Fish FAQ

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

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, 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.org/fish.asp

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

Fish Classification: The Classes of Fishes

List of all classes, orders, families, and genera of fish.
http://cichlidresearch.com/fish_html/allfish.html

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

Marine Fish Fauna in Hong Kong Waters

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

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/

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

Native Fish Photo Gallery

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

Neotropical Fish Image Gallery

Collections of photographs of fish species found in the tropical regions of the Americas.
http://www.biocollections.org/imagegallery/

Hazardous Mediterranean Fish

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