Results for “paired fins”

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

unpaired fins

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

Used in 61 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

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

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

basipterygium

Basal bone or cartilage located at the base of the paired fins in some fishes.

Used in 2 profiles

base

The bottom or lowest part of something. Biology. The point of attachment of a part or organ, e.g., a fin. Chemistry. A substance that can accept protons or donate pairs of electrons. The chemical opposite of an acid. Bases have a pH greater than 7.0 and a solution containing one or more bases is often referred to as an alkali.

Used in 1,187 profiles

coracoid

Paired endochondral bone located at the base of the pectoral fin upon which rest the pterygials or actinosts. Attaches to the cleithrum anteriorly.

Used in 18 profiles

scapula

Paired bone attached to the pterygials, actinosts or radials of the pectoral fin. Articulates ventrally with the coracoid and anteriorly with the cleithrum.

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

head and lateral line erosion

Severe physical condition relatively common to certain fishes in captivity and also known as hole-in-the-head. Sometimes attributed to protozoan parasites of the genus Hexamita or an autoimmune disorder though these theories remains unconfirmed. Certainly associated with and exacerbated by poor water quality and/or nutrition, however. Initially manifests itself as small lesions, normally on the head of an affected individual, but may also extend along the lateral line and into the unpaired fins. If left unchecked these lesions can develop into larger, whitish pits and the condition may prove fatal. Often abbreviated to HLLE and similar to, but not analagous with, neuromastic pitting. Does not appear to occur in nature.

Used in 35 profiles