Results for “gill”

epibranchial

Bone or cartilage forming the upper part of the gill arch, positioned between the ceratobranchial and pharyngobranchial.

Used in 90 profiles

epibranchial organ

Present in some microphagous fishes and comprises a paired dorsal diverticulum located towards the posterior of the pharynx. In the majority of species it's divided into two sections by additional gill rakers which trap small food particles.

hyoid arch

Either of the second pair of pharyngeal or gill arches. Supports part of the tongue and the branchiostegal rays.

ich

Common name for Ichthyophthirius multifiliis, a protozoan which infects freshwater fish. Commonly referred to as white spot due to the characteristic white nodules formed under the skin or gill tissue during the feeding stage of its life cycle.

Used in 18 profiles

isthmus

Narrow strip of land connecting two larger areas, or a narrow strip of tissue connecting two larger body parts. In ichthyology often used in reference to the fleshy throat region of a fish which externally separates the two gill chambers.

Used in 26 profiles

lateral scale rows

The number of more-or-less vertically-arranged scale rows present between the upper end of the gill opening and the caudal fin base. Sometimes referred to as vertical scale rows and used in meristic counts when the lateral line is absent, incompletely pored or otherwise difficult to distinguish.

Used in 9 profiles

meristic character

A countable trait, e.g., the number of rays in a fin, gill rakers, lateral line scales, etc..

Used in 4 profiles

pseudobranch

Accessory or spurious gill, often located on the inner surface of the operculum in various fishes, that is usually small and sometimes completely obscured beneath the epithelium. Also referred to as pseudobranchia.

spiracle

An external respiratory opening, located between the eye and gill opening in certain, usually primitive, fishes.

Used in 13 profiles

suprabranchial

Above the gills.

Used in 100 profiles