Glossary

pectoral

Of, relating to or located on the chest, breast, or thorax; used to refer to a single pectoral fin in relation to fishes.

Used in 263 species profiles

axillary process
A modified, often elongate, scale or group of scales located at the base of the pectoral or ventral fins in some fishes.
body depth
The vertical distance between the dorsal and ventral margins of the body measured at the base of the pectoral fin where it joins the body. In most icthyological works the greatest dimension, normally anterior to the dorsal fin, is taken but in some cases body depth is measured at the origin of pectoral, pelvic and first anal. Fins or fin bases are not included in the measurement, however.
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.
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.
thorax
Middle section of the body containing the main organs of circulation and respiration. Not easily defined in fishes.