The zebrafish is named for the five uniform, pigmented, horizontal, blue stripes on the side of the body, which are reminiscent of a zebra's stripes, and which extend to the end of the caudal fin.

The main features of the fish, the fins, are bony fin rays and, except the caudal fin, have no direct connection with the spine.

The caudal peduncle is absent and the caudal fin is reduced to a stiff rudder-like structure.

Sexual dimorphism is slight, the male's caudal fin being more pointed.

An additional caudal fin covers the post-anal tail.

alt = Drawing of a shark labeling major anatomical features, including mouth, snout, nostril, eye, spiracle, dorsal fin spine, caudal keel, clasper, labial furrows, gill openings, precaudal pit and fins: first and second dorsal, anal, pectoral, caudal and pelvic

Sharks possess a heterocercal caudal fin in which the dorsal portion is usually noticeably larger than the ventral portion.

By contrast, most bony fish possess a homocercal caudal fin.

Coelacanths (, adaptation of Modern Latin Cœlacanthus " hollow spine ", from Greek κοῖλ-ος koilos " hollow " + ἄκανθ-α akantha " spine ", referring to the hollow caudal fin rays of the first fossil specimen described and named by Louis Agassiz in 1839 ) are members of an order of fish that includes the oldest known living lineage of Sarcopterygii ( lobe-finned fish and tetrapods ).

They possess a three-lobed caudal fin, also called a trilobate fin.

Coelacanths have 8 fins – 2 dorsal fins, 2 pectoral fins, 2 pelvic fins, 1 anal fin, and 1 caudal fin.

The tail is very nearly equally proportioned and is split by a terminal tuft of fin rays that make up the caudal lobe of the tail.

There is also an anal fin, which is also considered spiny, and a caudal fin.

The lobes of the caudal ( tail ) fin in muskellunge come to a sharper point, while those of northern pike are more generally rounded.

Walleyes are distinguished from their close cousin the sauger by the white colouration on the lower lobe of the caudal fin which is absent on the sauger.

In addition, the two dorsals and the caudal fin of the sauger are marked with distinctive rows of black dots which are absent from or indistinct on the same fins of walleyes.

Drums are somberly colored, usually in shades of brown, with a lateral line that extends to the tip of the caudal fin.

Most species have a rounded or pointed caudal fin.

The caudal fin is strongly divided and rigid, with a slender, ridged, base.

In the course of its evolution, the caudal fin ( tail ) of the sunfish disappeared, to be replaced by a lumpy pseudo-tail, the clavus.

The telson is flanked by a pair of long, thin caudal rami.

In rodents, the EC is located at the caudal end of the temporal lobe.

The vaginal opening is at the caudal end of the vulva, behind the opening of the urethra.

The gills of other insects are tracheal, and also include both thin plates and tufted structures, and, in the larval dragon fly, the wall of the caudal end of the alimentary tract ( rectum ) is richly supplied with tracheae as a rectal gill.

At the posterior end, a hardened caudal shield is sometimes present in Aspidosiphon.

The hypopharynx or laryngopharynx or ( Latin: pars laryngea pharyngis ) is the caudal part of the pharynx ; it is the part of the throat that connects to the esophagus.

Expression of this hairy-like bHLH transcription factor, which represses Neurogenin but is required for Ascl1, is progressively lost from the caudal thalamus but maintained in the prethalamus and in the stripe of rostral thalamic cells.

In terms of development, the human nervous system is often classified based on the original 3 primitive vesicles from which it develops: These primary vesicles form in the normal development of the neural tube of the human fetus and initially include prosencephalon, mesencephalon, and rhombencephalon, in rostral to caudal ( from head to toe ) orientation.

It is suspended by the caudal part of the mesentery ( mesoileum ) and is attached, in addition, to the cecum by the ileocecal fold.

It moves by combining pectoral, dorsal, anal, and caudal fins.

Because of this, they are slow-moving and rely on their pectoral, dorsal, anal, and caudal fins for propulsion rather than by body undulation.

Coelacanths can create thrust for quick starts by using their caudal fins.

The fish is characterized by an iridescent blue horizontal stripe along each side of the fish from its nose to the base of the adipose fin, and an iridescent red stripe that begins at the middle of the body and extends posteriorly to the base of the caudal fin.

Courtship includes expanding the dorsal and caudal fins and attempts by the male to escort the female to the nest.

Males display to each other by positioning themselves parallel to each other, head to tail, with dorsal and caudal fins erect and cheek odontode spines everted.

They are distinguished from other gymnotiform fishes by the presence of a caudal fin ( all other families lack a caudal fin ) as well as a fleshy dorsal organ represented by a longitudinal strip along the dorsal midline.

The larvae are entirely aquatic, and are characterized by large external gills and a prominent caudal fin that originates just behind the head.

Neurological examination that confirms macular sparing can go far in representing the type of damage mediated by an infarct, in this case, indicating that the caudal visual cortex ( which is the principal recipient of macular projections of the optic nerve ) has been spared.

The tail was bi-lobed, with the lower lobe being supported by the caudal vertebral column, which was " kinked " ventrally to follow the contours of the ventral lobe.

At the caudal extreme it is bounded approximately by the parieto-occipital sulcus.

Cytoarchitecturally it is bounded dorsally by the dorsal posterior cingulate area 31, rostrally by the ventral anterior cingulate area 24, and ventrorostrally in its caudal half by the retrosplenial region ( Brodmann-1909 ).