Bony
Acipenseriformes, Anguilliformes, Clupeiformes, Coelacanthiformes, Cypriniformes, Cyprinodontiformes, Esociformes, Gasterosteiformes, Lophiiformes, Osmeriformes
Cartilaginous
Carcharhiniformes, Lamniformes, Orectolobiformes, Rajiformes, American Elasmobranch Society, Canadian Shark Research Laboratory, Center For Shark Research, Clark, Dr. Eugenie - Ichthyologist, Class Chondrichthyes, CSIRO Marine: Tagging Research, Dedicated Shark Site, Egg-Capsules of Sharks, Skates, and Chimaeras, ElasmoWorld, European Elasmobranch Association
Hagfish
Hyperotreti - Hagfishes, Introduction to the Myxini, OceanInfo - Hagfish, Pacific Hagfish, The Lowly Hag
Lampreys
Hyperoartia, Introduction to the Petromyzontiformes, Lampreys - Petromyzontidae, Sea Lamprey in the Great Lakes
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.
East Coast Fish-Watch Project
Designed to help people to learn more about South Africa's marine fishes and how to identify them.
Find a Fish
Australian Museum collection of factsheets on fish species. Listed by scientific or common name, or search the database.
Fish Classification: The Classes of Fishes
List of all classes, orders, families, and genera of fish.
Fish FAQ
Fascinating facts about fish from U.S. National Marine Fisheries Service Northeast Fisheries Science Center.
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.
FishBase
Searchable global database containing information on 25,585 species (110,000 common names), 71,000 synonyms, 28,000 photos, and 21,000 references.
Gray's Reef Fish Guide
An illustrated guide to the fishes of Gray's Reef National Marine Sanctuary off the coast of Georgia, USA.
Hazardous Mediterranean Fish
An illustrated guide by the late Dr. Louis Zammit, M.D.
Key to the Fishes of Puget Sound
Identification key and guide to all families of fishes in Puget Sound (Washington, USA).
Marine Fish Fauna in Hong Kong Waters
The first fish Internet database in Hong Kong.
Native Fish Photo Gallery
Images of fish native to the north-central United States.
Neotropical Fish Image Gallery
Collections of photographs of fish species found in the tropical regions of the Americas.
North American Freshwater Fish
Taxonomic checklist of all the freshwater fish of North America, including some range maps and images.
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.