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.
Dentin
Dentin is a type of bone tissue that is part of the placoid scales of shark fish.The flat, rectangul..
Derma
Derma (Latin dermis, from Greek δέρμα - skin), corium (Latin corium, from Greek κόριον - skin.Fish s..
Detritivore
From Latin detritus "decay; product of decay" + Greek φάγος "devourer.Detritivore are hydrobionts: u..
Detritus
From the Latin detritus "worn out.Detritus is the remains of decomposed animals and plants suspended..
Dew
Dew (soil) - bottom sediments of predominantly dystrophic water bodies, whose waters are rich in hum..
Diet
Diet - the amount of food consumed by a fish over a given period, expressed as a percentage of body ..
Digestive system
Digestive system - a system of organs that provide mechanical grinding and breakdown of complex orga..
Diphycercal caudal fin
From Di... and Greek phýo, to produce, arise, and kérkos, tail.Diphycercal caudal fin - externally a..
Diphyllobothriasis
Latin diphyllobothriasis.Helminthiasis of the group of cestodoses, a zooanthroponotic infestation ca..
Diplostraca (Cladocera)
A suborder of crustaceans in the order Fyllopoda. They are ubiquitous in marine and freshwater envir..
Dipnoi
A superorder of freshwater bony fishes of the subclass shovelnose. Known since the Middle Devonian, ..
Diptychus
Diptychus is a genus of freshwater fish of the carp family. The body is covered with scales or naked..
Disinfection
Disinfection - suppression and destruction of pathogens of infectious and invasive diseases of fish ..
Distribution
Distribution of hydrobionts over the entire area of a water body (watercourse) or in its individual ..
Dominant species
Plant or animal species that quantitatively dominate an aquatic ecosystem and play a critical role i..