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.
Gill interspace
The head of a fish is subdivided into:snout - from the end of the snout to the front edge of the eye..
Gill membrane
The gill membrane is the film that surrounds the outer edge of the gill cover and tightly covers the..
Gill petals
The gill arches have gill stamens on the inside and gill petals on the outside. The gill filaments, ..
Gill rays
Gill rays are bony outgrowths that support the gill membrane. A number of long bony sticks - gill me..
Gill slit
Gill opening (slit)-formed by the gill cover and the body surface, serves to release water from the ..
Gill stamens
Gill stamens are outgrowths on the front side of the gill arch and serve to strain out food organism..
Gillnetting
Gillnetting is a method of fishing that uses gillnets: vertical webs of netting that hang from a fis..
Gills
Gills are the respiratory organs of fish; they are gill lobes on the gill arches with a well-develop..
Glochidium
From the Hebrew-Greek glochis, arrowhead, spike.Glochidia is a parasitic larva of freshwater bivalve..
Goatfishes
Goatfishes (Mullidae) are a family of fishes in the order Perciformes. There are 7 genera and about ..
Goby (Gobiidae)
The gobies (lat. Gobiidae) are a family of ray-finned fishes in the order Gobiiformes. More than 200..
Gonad maturity index
The degree of maturity of the gonads is also characterized by maturity coefficient and maturity inde..
Goosefish
Lophiidae is a family of fishes in the order Lophiiformes. The body is flattened, bare or covered wi..
Granular caviar
The eggs in granular caviar are not bound together and remain spherical. To achieve this, fresh raw ..
Groundwater
Groundwater - groundwater of the nearest to the surface of the earth permanent aquifer, which does n..