Results for “fin”

fin

Membranous appendage supported by cartilage or bony rays. Used for locomotion, steering, and balance by fishes and some other aquatic organisms.

Used in 800 profiles

fin-spine

Unsegmented and unbranched, bony structure supporting the fins in teleosts. Usually hard, rigid and pointed and may have a smooth or serrated edge. Not laterally-paired like rays, and in some species modified to form a protective structure.

Used in 15 profiles

adipose-fin

A small, fleshy, rayless fin present in certain fishes and located behind the dorsal fin.

Used in 100 profiles

anal-fin

A median, unpaired, ventral fin located between the anus and caudal fin, usually in the posterior portion of the body. Used to maintain equilibrium and stability.

Used in 764 profiles

dorsal-fin

Median, rayed, unpaired fin located on the dorsal surface (back) of most fishes. Its main purpose is to prevent the animal rolling and enable it to turn sharply. Some species possess more than one dorsal fin, in which case the anterior one is referred to as the first.

Used in 860 profiles

pelvic fin

Either of the pair of fins, also known as pelvic fins, attached to the pelvic girdle in fishes that help control the direction of movement. Correspond to the hind legs in higher vertebrates and vary in position depending on taxon. Sometimes absent entirely.

Used in 431 profiles

principle caudal-fin rays

Fin rays forming the dorsal or ventral margins of the caudal fin, supported by the supported by the hypural and parahypural.

Used in 1 profile

ventral-fin

Either of the pair of fins, also known as pelvic fins, attached to the pelvic girdle in fishes that help control the direction of movement. Correspond to the hind legs in higher vertebrates and vary in position depending on taxon. Sometimes absent entirely.

Used in 74 profiles

vertical fin

Unpaired, median fin, i.e., dorsal, caudal, adipose and anal fins.

Used in 1 profile

anal-fin origin

Anteriormost point at which the anal fin base is attached to the body.

Used in 108 profiles

caudal-fin

Also referred to as the tail fin, it's main purpose is thrust and propulsion.

Used in 790 profiles

notched fin

A fin with a notch.

paired fins

The pectoral and pelvic/ventral fins, both of which occur in pairs and are analogous to the fore and hind limbs in higher animals.

Used in 58 profiles

pectoral-fin

Anterior, paired fin attached to the pectoral girdle of fishes, usually just behind the opercle and corresponding to the forelimbs of higher vertebrates. Assists in controlling direction of movement and swimming speed. Frequently abbreviated to 'P' or 'P1' in scientific papers.

Used in 508 profiles

unpaired fins

The dorsal, caudal, anal and, if present, adipose fins.

Used in 61 profiles

ventral-fin basket

Vernacular nerm used to describe the post-spawning behaviour of cupping or clamping of the ventral fins in order to transport fertilised eggs. Exhibited by females of some Corydoras species, for example.

affinis

See aff..

Used in 20 profiles

apical

Refers to the tip or cusp of an oral tooth, or denotes orientation towards the apex or tip of a fin, fin-spine, etc..