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.
River length
River length - the distance from the source to its mouth. It is measured along the geometric axis of..
Rostrum
The rostrum is the anterior end of a chordate animal. It is derived from the word snout (rostrum).Th..
Russian sturgeon
Russian sturgeon (Acipenser gueldenstaedtii) is a passable fish of the sturgeon family. Length up to..
Salmonidae
Salmonidae is a family of fishes of the order Salmoniformes. Passable and freshwater fishes. They li..
Salvelinus
Salvelinus is a genus of fish in the salmon family. They have very fine smooth scales, which makes t..
Salvelinus leucomaenis
Salvelinus leucomaenis is a migratory fish of the char genus. It has large light-colored spots on it..
Saprobicity
From the Greek sapros, meaning rotten.Saprobicity is a complex of physiological and biochemical prop..
Sapropel
From Greek σαπρός "rotten" + πηλός "clay; silt, mud".Sapropel - muddy bottom sediments of organic or..
Sarcopterygii
Sarcopterygii is a subclass of bony fishes. The axial skeleton is in the form of a chord. The jaw ar..
Sardine
Sardine is a fish of two genera Sardina and Sardinops of the family Clupeidae. The mouth is terminal..
Sardinella
Sardinella is a genus of fish in the family Clupeidae. Gregarious marine pelagic fish 20-40 cm long,..
Scales
Scales are bone formations on the body of a fish that protect the body from damage, penetration of m..
Scaphirhynchus
Scaphirhynchus is a genus of freshwater fish of the sturgeon family. Length 60-90 cm, rarely 1.3 m, ..
Schizothorax
Schizothorax is a genus of freshwater fishes of the family Cyprinidae. Scales are small. The mouth i..
Scomberesocidae
Scomberesocidae is a family of fishes of the Beloniformes. The body is arrow-shaped, covered with sm..