- Alessandro De Maddalena: Shark Specialist - Alessandro De Maddalena’s personal page with details of his research on sharks, his work as a marine wildlife illustrator, his collaborations and publications.
- Australian Museum Fish Department - General introduction to ichthyology and information about the museum's research in the classification.
- Balkan Trout Restoration Group - Genetic research on trout species and subspecies from several locations in the Balkans, the problems of stocking and restoration the native trout population and details of studied fish taxa, field trips and published papers.
- Basic Fish Anatomy - Outline of the external features including body shape, head, fins, gills, lateral line, coloring and swim bladder.
- Breeding Fish - Information on fish reproduction and the rearing of fry, concentrating on the species usually found in aquaria.
- California Academy of Sciences Ichthyology - Fish systematics research site includes catalog, checklists, and images of fishes.
- Calypso Publications - Publishers of ichthyological taxonomic texts. Descriptions of publications, book reviews and sample images.
- Catalog of Fishes - Database that includes more than 53,000 species of fish as well as bibliographic references.
- Cold Water Chemistry - Brief description of the many physiological adaptations that Arctic fish have made to help them cope with life at low temperatures.
- Dictionary of Ichthyology - Defines terms used in the study of fishes and fisheries.
- Dr. Eugenie Clark: Ichthyologist - Information about the renowned shark researcher, including answers to questions about her shark-related adventures.
- Feeding Habits of Fish - Mat Couchman aims to discover the main elements of the food chain in a reservoir, culminating at the pinnacle level with the crucian carp (Carassius carassius).
- Fish - A brief outline of the essential features of fish biology.
- Fish - Fish Information Website. Everything you need to know about the biology of the fish.
- Fish - Biomedia Zoology Museum - An introduction to the taxonomy of fish with explanations of the technical terms used.
- Fish Anatomy - An illustrated introduction to the external and internal anatomy of the fish.
- Fish Anatomy - Provides information on the external and internal anatomy of the fish including the outer covering, the fins and the bodily functions.
- Fish Are Open Systems - An article discussing how fish have adapted to the problems posed by life in water and how osmoregulation is a vital function affecting all aspects of fish health.
- Fish Biology: Respiration in Marine Fish - Describes the mechanisms that fish can utilize to extract oxygen from the water, concentrating on the gills.
- Fish in Extremes - Article discussing how teleosts and hardy elasmobranches have adapted to survive in low oxygen environments.
- Fish Muscle Research Group - List of scientific publications submitted to this organization which is based at the Gatty Marine Laboratory in Scotland.
- Fish neurobiology - The University of Oslo runs a strategic program that aims to educate the next generation of fish physiologists and neurobiologists.
- Fish on Line - A computer-based course on ichthyology for students in biology or environmental science.
- Fish Physiology and Biochemistry - Journal that publishes original research papers in all aspects of fish physiology and biochemistry.
- Fish Scope - Time-lapse recordings and confocal images dealing with the developmental biology of fish.
- Fish: A Quick Course in Ichthyology - Introduction to the study of ichthyology and the characteristics of fish presented by Jason Buchheim.
- FISH-SCI: Scientific Forum on Fish and Fisheries - Contains the online archives of the mailing list for this forum.
- Fishes and Scales - Photographic study by Jean-Marie Cavanihac on fish scales and also many photographs of developing fish embryos, with video clips.
- Florida Museum of Natural History Ichthyology Collection - Comprehensive searchable fish database that offers fish data, shark research and images.
- Ichthyological Association - German language platform for scientists and ichthyologically interested persons. Data about events and article abstracts.
- Ichthyology Web Resources - Resources of scientific and educational value, maintained by Keith Jackson.
- Induced Reproduction in Fish - Many species of fish will not readily reproduce under certain culture conditions. This article describes the natural breeding cycle and the induction of spawning.
- Losey Lab - Showcases information concerning the effects ultraviolet rays have on coral reef fish vision, coloration, behavior and ecology.
- Love Lab - Features fish research, biology and a list of species that reside off the Pacific coast in North America.
- Museum of Southwestern Biology: Fishes - Project guides and reports of ongoing research currently conducted at the University of New Mexico.
- Native Fish Research Group - Researchers and projects dedicated to fish evolutionary genetics and conservation in British Columbia, Canada.
- Neodat Project - Database of fish biodiversity in the Neotropics. Systematic and geographic data on freshwater fish specimens.
- Neotropical Ichthyological Association - Formed by a group of ichthyologists and students with a broad range of interests in neotropical fish.
- New Zealand Native Freshwater Fish Society. - This group hopes to raise awareness of native fish and increase scientific knowledge of them to try to prevent more from becoming extinct.
- Pain in Fish - A brief account of fish biology, behavior, neuroanatomy and a consideration of whether fish feel pain.
- Peces Criollos - Permanently up-to-date about systematics of the freshwater fishes from Argentina. Also includes PDF downloads and links.
- A Study into the Locomotion of Fishes - Article explaining how fish swim and why they have developed very different body shapes.
- Technology for Fish Propagation - Janos Bakos provides comprehensive technical data on the conditions necessary for the reproduction of cultivated fish species.
- Teleost Fish Morphology and Anatomy - Instruction on examining the external and internal characteristics of a fish, as given to students on the marine biology course at Bangor University.
- Texas Natural History Collections: Ichthyology - Images, distribution maps and other data on North American freshwater fish.
- The Biology of the Fish - A brief account of fish biology which also considers stress and the welfare of farmed fish.
- The Ichthyological Society of Japan - ISJ was established in 1968 to advance the study of fishes and fish biology. There is a meeting each October and it publishes members papers and the Japanese Journal of Ichthyology. In English and Japanese.
- The Identification of Oestrogenic Effects in Wild Fish - Technical report into the occurrence of intersex in roach and gudgeon and the role played by treated sewage effluent in the feminizing effects observed in UK roach populations.
- The Impact of Environmental Levels of Aquatic Contaminants on Atlantic Salmon - Research into the impact of agricultural pesticides on sensitive stages of the life history of Salmonids. [PDF]
- The Physiological and Metabolic Adaptations of Salmonids - Mat Couchman discusses the environmental influences and changes in lifestyle that create physiological and metabolic adaptations in fish and also deals with their basic nutritional requirements.
- Trans-Sexual Fish - David Allsop at the University of Edinburgh has been studying fish that can change sex at some point during their life. [PDF]
- Bony Fishes@ (150)
- Cartilaginous Fishes@ (148)
- Hagfishes@ (6)
- Lampreys@ (8)
