Dictionary of Ichthyology
This dictionary of ichthyology contains specialist terms used in the teaching of undergraduate students. The terms are arranged alphabetically for ease of reference.
In addition to ichthyology, terms from hydrobiology, zoology, anatomy, fish farming and other related disciplines are included.
Where terms have different interpretations, we have assigned the most common interpretation in our view.
This dictionary is constantly being added to and modified.
If you do not agree with the above interpretation of the Terms, please explain your understanding in the comments to these Terms.
We invite you to participate in the development of a modern ichthyological vocabulary.
We will consider any criticism and take it into account when describing dictionary terms.
Additional fins
In addition to the main fins, there may be additional fins on the body of fish. These include the ad..
Additional fish
Supplementary fish - are added to the main object of breeding in ponds, lakes for a more complete us..
Adipose fin
Fat fin - a leathery fold without rays on the caudal stem behind the dorsal fin in salmonids, whitef..
Aedificator species
These are the species of living organisms that most determine the structure, character and functioni..
Age composition
A value that shows the proportion or percentage of fish of a given age group in relation to the tota..
Age group
A group of individuals of the same age (year of birth) in a given population. Age group, a group of ..
Age structure
Distribution of fish by age groups. The age structure is a species-specific adaptation, providing th..
Algaculture
Algaculture is a form of aquiculture involving the farming of species of algae.Microa..
Algae (Algac)
A group of energetic plants, most of which contain chlorophyll in their cells and are able to carry ..
Allopatric species
A species that has evolved from related forms that are geographically isolated from each other (isol..
Alosa saposchnikowii, Alosa caspi, Alosa sphaerocephala
Alosa saposchnikowii, Alosa caspi, Alosa sphaerocephala - a group of fish, similar in appearance, be..
Amiidae
Amiidae is a family of fishes of the order Amiiformes. It includes one genus Amia with a single repr..
Amphipoda
Division Foot crabs, subclass Higher crabs (Malacostraca). The body length is usually 1-2 cm. The bo..
Anabantidae
Anabantidae - a group of fishes with a labyrinth apparatus (Anabaceae), which is an enlarged pocket-..
Anarhichadidae
Anarhichadidae is a family of fishes of the order Perciformes. The body is elongated, covered with f..