Fish in Extremes
- Article discussing how teleosts and hardy elasmobranches have adapted to survive in low oxygen environments.
- http://www.sebiology.org/publications/Bulletin/July06/Sink.html

Breeding Fish
- Information on fish reproduction and the rearing of fry, concentrating on the species usually found in aquaria.
- http://www.tropicalfishexpert.co.uk/BreedingFish.html

Fishes and Scales
- Photographic study by Jean-Marie Cavanihac on fish scales and also many photographs of developing fish embryos, with video clips.
- http://www.microscopy-uk.org.uk/mag/artjan02/fishes.html

Fish Keeping Terms
- Glossary of technical terms used in fish biology.
- http://www.fishtanksandponds.info/terminology/fish-anatomy-terms.htm

Fish on Line
- A computer-based course on ichthyology for students in biology or environmental science.
- http://www.fishbase.org/FishOnLine/English/index.htm

Dictionary of Ichthyology
- Defines terms used in the study of fishes and fisheries.
- http://www.briancoad.com/Dictionary/introduction.htm

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.
- http://www.fish-isj.jp/index-e.html

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.
- http://www.nzfreshwater.org/

Technology for Fish Propagation
- Janos Bakos provides comprehensive technical data on the conditions necessary for the reproduction of cultivated fish species.
- http://www.fao.org/docrep/x5744e/x5744e0c.htm

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.
- http://www.sos.bangor.ac.uk/marine/mb/O2B05/Fishpract1.doc

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.
- http://www.seagrant.umn.edu/aquaculture/induced_fish_reproduction

Fish
- A brief outline of the essential features of fish biology.
- http://www.mcwdn.org/Animals/Fish.html

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.
- http://www.wyeuskfoundation.org/images/aquatic_contaminants.pdf

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.
- http://publications.environment-agency.gov.uk/pdf/SW2-014-TR-e-e.pdf?lang=_e

Basic Fish Anatomy
- Outline of the external features including body shape, head, fins, gills, lateral line, coloring and swim bladder.
- http://fish.mongabay.com/anatomy.htm

Cold Water Chemistry
- Brief description of the many physiological adaptations that Arctic fish have made to help them cope with life at low temperatures.
- http://www.arctic.uoguelph.ca/cpl/organisms/fish/adaptations/coldwatchem.htm

Fish neurobiology
- The University of Oslo runs a strategic program that aims to educate the next generation of fish physiologists and neurobiologists.
- http://biologi.uio.no/genfys/groups/GN/nfr.html

Fish Muscle Research Group
- List of scientific publications submitted to this organization which is based at the Gatty Marine Laboratory in Scotland.
- http://www.st-andrews.ac.uk/~fmrg/papers/allpubs.html

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.
- http://www.fisheriesmanagement.co.uk/Fish%20Studies/adaptations_of_salmonids.htm

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).
- http://www.fisheriesmanagement.co.uk/research.htm

A Study into the Locomotion of Fishes
- Article explaining how fish swim and why they have developed very different body shapes.
- http://www.fisheriesmanagement.co.uk/Fish%20Studies/locomotion_study.htm

Fish - Biomedia Zoology Museum
- An introduction to the taxonomy of fish with explanations of the technical terms used.
- http://www-biol.paisley.ac.uk/biomedia/text/txt_fish.htm

Fish Anatomy
- An illustrated introduction to the external and internal anatomy of the fish.
- http://www.iowas.co.uk/fish%20anatomy.html

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.
- http://www.fishdoc.co.uk/water/open_systems.htm

Fish Biology: Respiration in Marine Fish
- Describes the mechanisms that fish can utilize to extract oxygen from the water, concentrating on the gills.
- http://www2.hawaii.edu/~delbeek/delb10.html

Pain in Fish
- A brief account of fish biology, behavior, neuroanatomy and a consideration of whether fish feel pain.
- http://www.vet.ed.ac.uk/animalwelfare/Fish%20pain/Contents.htm

The Biology of the Fish
- A brief account of fish biology which also considers stress and the welfare of farmed fish.
- http://www.fawc.org.uk/reports/fish/fishr004.htm

Trans-Sexual Fish
- David Allsop at the University of Edinburgh has been studying fish that can change sex at some point during their life.
- http://westgroup.icapb.ed.ac.uk/PDF-media/PlanetEarth_03.pdf

Fish Physiology and Biochemistry
- Journal that publishes original research papers in all aspects of fish physiology and biochemistry.
- http://www.springer.com/east/home?SGWID=5-102-70-35532323-detailsPage=journal|description|description

Fishdisease.net
- Web portal for fish health professionals, including directory of researchers, conference calendar, job postings, images of parasites and pathological conditions of fishes, and links to journals, associations, suppliers, and other resources.
- http://www.fishdisease.net/

Peces Criollos
- Permanently up-to-date about systematics of the freshwater fishes from Argentina. Also includes PDF downloads and links.
- http://www.pecescriollos.de/

California Academy of Sciences Ichthyology
- Fish systematics research site includes catalog, checklists, and images of fishes.
- http://www.calacademy.org/research/ichthyology/

Australian Museum Fish Department
- General introduction to ichthyology and information about the museum's research in the classification.
- http://www.amonline.net.au/fishes/about/index.cfm

Texas Natural History Collections: Ichthyology
- Images, distribution maps and other data on North American freshwater fish.
- http://www.utexas.edu/tmm/tnhc/fish/index.html

Ichthyological Association
- German language platform for scientists and ichthyologically interested persons. Data about events and article abstracts.
- http://www.ichthyologie.de/

Neotropical Ichthyological Association
- Formed by a group of ichthyologists and students with a broad range of interests in neotropical fish.
- http://www.mct.pucrs.br/lab/museu/nia/

Museum of Southwestern Biology: Fishes
- Project guides and reports of ongoing research currently conducted at the University of New Mexico.
- http://msb-fish.unm.edu/

Ichthyology Web Resources
- Resources of scientific and educational value in an organized directory. Includes specimen database links.
- http://www.biology.ualberta.ca/jackson.hp/IWR/

Native Fish Research Group
- Researchers and projects dedicated to fish evolutionary genetics and conservation in British Columbia, Canada.
- http://www.zoology.ubc.ca/~etaylor/nfrg/nfrg.html

Losey Lab
- Showcases information concerning the effects ultraviolet rays have on coral reef fish vision, coloration, behavior and ecology.
- http://www.hawaii.edu/loseylab

Fish Scope
- Time-lapse recordings and confocal images dealing with the developmental biology of fish.
- http://depts.washington.edu/fishscop/

Catalog of Fishes
- Database that includes more than 53,000 species of fish as well as bibliographic references.
- http://www.calacademy.org/research/ichthyology/catalog/

Love Lab
- Features fish research, biology and a list of species that reside off the Pacific coast in North America.
- http://id-www.ucsb.edu/lovelab/index.html

Florida Museum of Natural History Ichthyology Collection
- Comprehensive searchable fish database that offers fish data, shark research and images.
- http://www.flmnh.ufl.edu/fish/

Fish, A Quick Course On Ichthyology
- Introduction to the study of ichthyology and the characteristics of fish presented by Jason Buchheim.
- http://www.marinebiology.org/fish.htm

Neodat Project
- Database of fish biodiversity in the Neotropics. Systematic and geographic data on freshwater fish specimens.
- http://neodat.org/