Dictionary of Ichthyology

A flock (shoal) is a temporary grouping of fish that exhibits unity of behavior...

Abdominal pores (latin: pori abdominales) are small paired openings lying usuall..

The pelvic fins are located behind the pectoral fins (herring, carp, salmon).Abdominal fishes, those..

Abiotic – referring to non‐living structures, substances, factors, environments, etc...

Abiotic environmental factors are a complex of physical and chemical environmental conditions of org..

Absolute abundance – the total number of a kind of fish in the population.Usually estimated fr..

Absolute conversion rate of food = an index calculated by dividing the quantity of food distributed ..

Absolute fecundity – total number of eggs in a female...

Abyssal fish are deep-sea fishes that live at considerable depths, from 3,000 metres and more. All f..

The abyssal zone or abyssopelagic zone (from the Greek ἄβυσσος - ..

Abyssocottinae is a family of fish of the order Scorpaeniformes. Endemics of Lak..

Abyssopelagic is a layer of water located above the ocean bed at depths of 3000-6000 m (abyssal)...

Achelata are members of the Decapoda order of crayfish (Decapoda). The body leng..

Actinopterygii is a superclass of bony fishes. It unites more than 96% of living..

Adaptation - the process (or its results, e.g. a structure) wherein individuals, populations or spec..

Ichthyologist Dictionary