Results for “dorsal”

dorsal

Of, toward, on, in, or near the back or upper surface of an organism or part.

Used in 667 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

predorsal scale

Any of the scales lying on the dorsal midline between the back of the skull and insertion/origin of the dorsal fin.

Used in 101 profiles

interdorsal

In species possessing more than a single dorsal fin, the space between the first and second fins.

postdorsal

Located posterior to the dorsal fin.

Used in 23 profiles

postdorsal length

The distance between the dorsal fin insertion/origin and caudal fin base.

Used in 2 profiles

predorsal

Area or region anterior to the first dorsal fin.

Used in 75 profiles

predorsal length

Distance between the tip of the upper jaw and inseryion/origin of first dorsal fin..

Used in 19 profiles

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.

Used in 85 profiles

nape

In fishes, the part of the dorsal surface between the posterior edge of the skull and dorsal fin insertion.

Used in 37 profiles

adipose crest

Fatty ridge of flesh extending along the dorsal or ventral surface of the caudal peduncle in certain fishes, e.g., some Schistura spp.

Used in 7 profiles

adipose-fin

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

Used in 100 profiles

caudal keel

A fleshy, raised ridge extending along the caudal peduncle, most commonly the dorsal surface.

caudal peduncle

The typically narrow section of the body located between the posterior of the dorsal and anal fins and caudal fin origin. Its depth is measured vertically at the narrowest point.

Used in 394 profiles

cleithral spot

Variably-sized (depending on species), usually dark marking present in the cleithral area dorsal to the pectoral fin insertion. Normally visible externally in llive specimens.

Used in 17 profiles

cleithrum

Major bone of the pectoral girdle. Extends upward from the pectoral fin base and forms the rear margin of the branchial cavity. Articulates with the supracleithrum dorsally, the scapula and coracoid ventrally. Also known as proscapulum.

Used in 4 profiles

countershading

Form of camouflage in which an organism possesses darker pigmentation on the parts of the body exposed to light and paler on those normally shaded. Many fishes are coloured darker dorsally and lighter ventrally for this purpose.

Used in 4 profiles

dorsolateral

Positioned or orientated between the dorsal and lateral surfaces.

Used in 7 profiles

dorsoventral

Positioned or orientated between the dorsal and ventral surfaces.

Used in 3 profiles