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.
The excretory system
A set of organs (kidneys, ureters) responsible for excretion of end products of metabolism, excess w..
The length of the fish to Smith
There are many fish measurement schemes developed by Kessler K. F., Varpahovsky N. A., J. L. B. Smit..
The loach (Misgurnus fossilis)
A freshwater fish of the loach family. Length 16-25 cm, rarely larger, weight 25-40 g, sometimes up ..
The mating period
It occurs in fish at the time of reproduction and ends after the sexual products are washed out. Acc..
Thermoreceptor
Thermoreceptors are sensitive nerve endings that perceive changes in temperature. In most bony fish,..
Thoracic location of pelvic fins
Thoracic location of pelvic fins - a group of highly organized fishes whose pelvic fins are displace..
Three-spined stickleback
Three-spined stickleback (Gasterosteus aculeatus) is a fish of the stickleback family. Length 5-6 cm..
Thymallidae
Thymallidae is a family of fishes in the order Salmoniformes. The dorsal fin is long and the scales ..
Thymallus
Thymallus - Two species of the genus Thymallidae. Freshwater river and lake fish. They have teeth on..
Tolerant species
From the Latin tolerantia patience.Tolerant species are hydrobionts that are able to withstand devia..
Trematoda
The name of the class, Tgematoda, is borrowed from Greek. It means "having suckers".Trematoda is a c..
Triggerfishs
Triggerfish (Balistidae) are a family of fishes in the order Tetraodontiformes. The body is large, f..
Trophology
From Ancient Greek τροφή, "nourishment", + λόγος, "science". &nbs..
Tropibasal skull
From the Greek trópis - keel and bá́sis - base.The tropibasal skull is a skull with a narrow base an..
Tubificidae
Tubificidae is a family of the class Oligochaeta.Length 0.3-20 cm. Body filamentous, red or pink. It..