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.
Protandry
From the Greek protos - first and andreios - male.Protandry is a form of non-functional hermaphrodit..
Proteins
High molecular weight organic substances consisting of alpha-amino acids linked by a peptide chain. ..
Protocercal caudal fin
The protocercal caudal fin is primordially equal-lobed and has the appearance of a border supported ..
Protogyny
Protogyny - the phenomenon of sex change in hermaphroditic individuals. At a young age, the ovarian ..
Protozoa
From Ancient Greek πρῶτος, the first and ζῷα, plural forms from Ancient Greek ζῷον, a living being.P..
Psammophiles
Psammophiles is an ecological group of fish that lay eggs on sandy soil (gudgeon, Siberian char, ruf..
Pterygopodium
Pterygopodium is an elongated basal ray of the pelvic fin in sharks and rays, which is the skeletal ..
Pungitius pungitius
Pungitius pungitius is a fish of the genus Spiny Beetles, family Spiny Beetles. There are 9-12 spine..
Pyloric appendages
Pyloric appendages are blind growths of the intestine directly near the stomach, varying in number, ..
Race
Race - hereditarily stable intraspecific groupings of fish, the emergence of which is due to the act..
Rare species
Few fish species. Represented by a small number of populations in a narrow range scattered over a la..
Red king crab
Red king crab (Paralithodes camtschaticus) is a representative of the suborder Reptantia. The width ..
Redfin
The redfin (cardinius erythrophthalmus) is a freshwater fish of the redfin genus of the carp family...
Regeneration
Regeneration - restoration of damaged tissues and organs by the organism. To a greater extent, regen..
Relict species (relicts)
Species that once had a very wide distribution are now found only in a limited area as a remnant of ..