The dorsal fin is small, visible only briefly during the dive sequence.

Spotted Dolphin The pectoral fin and dorsal fin of the dolphin contribute to its agility and speed in the water.

The pectoral fins are movable and used in maneuvering ; the dorsal fin is fixed and contributes stability, and the tail is used for propulsion, as well as maneuvering.

Swimming water animals such as fish and cetaceans actively use pectoral fins for maneuvering, and dorsal fins contribute stability as the animal swims, propelling and maneuvering with its tail, itself recognizable as a fin.

The gray whale also lacks a dorsal fin, instead bearing 6 to 12 dorsal crenulations (" knuckles "), which are raised bumps on the midline of its rear quarter, leading to the flukes.

Female residents characteristically have rounded dorsal fin tips that terminate in a sharp corner.

The gray or white area around the dorsal fin, known as the " saddle patch ", often contains some black colouring in residents.

Offshores appear to be smaller than the others, and females are characterized by dorsal fin tips that are continuously rounded.

Most of the dark parts of its body are medium gray instead of black, although it has a dark gray patch called a " dorsal cape " stretching back from its forehead to just behind its dorsal fin.

It is immediately recognizable by its extremely small white eye patch, shorter than usual dorsal fin, and bulbous head ( similar to a pilot whale ).

alt = Killer whale with only top of back and dorsal fin visible above water surface, the dorsal fin curves backward at the tip.

It has a heavy and robust body with a large dorsal fin up to tall.

At about the male's dorsal fin is more than twice the size of the female's and is more of a triangular shape — a tall, elongated isosceles triangle — whereas hers is shorter and more curved.

An individual killer whale can often be identified from its dorsal fin and saddle patch.

Variations such as nicks, scratches, and tears on the dorsal fin and the pattern of white or grey in the saddle patch are unique.

alt = Back and dorsal fin of killer whale projecting above the sea surface, including the grey saddle patch and part of the white eye patch: The dorsal fin rises steeply to a rounded point.

In aquatic salamanders and in frog tadpoles, the tail has dorsal and ventral fins and is moved from side to side as a means of propulsion.

The three sepals are generally colourful and bright ( which is why they are sometimes called outer tepals ), with one on each side (" lateral sepals ") and one usually at the top of the flower (" dorsal sepal "), sometimes forming a hood.

This is generally caused by dysfunction of the dorsal columns of the spinal cord, because they carry proprioceptive information up to the brain.

A second, dorsal aorta carries oxygenated blood from the gills to the rest of the body, and is homologous with the descending aorta of tetrapods.

In all craniates except for hagfish, the dorsal hollow nerve cord is surrounded with cartilaginous or bony vertebrae and the notochord is generally reduced ; hence, hagfish are not universally regarded as vertebrates, though recent DNA comparisons suggest that they are in fact vertebrates.

But with a few striking exceptions, such as Xavante and Tahitian-which have no dorsal consonants whatsoever-nearly all other languages have at least one velar consonant: the few languages that do not have a simple usually have a consonant that is very similar.

The CNS is contained within the dorsal cavity, with the brain in the cranial cavity and the spinal cord in the spinal cavity.

Like type B, it is primarily white and medium gray, with a dark gray dorsal cape and yellow-tinged patches.

There is no dorsal hump.

Slow pain is transmitted via slower type C fibers to laminae II and III of the dorsal horns, together known as the substantia gelatinosa.

The central analgesia system is mediated by 3 major components: the periaquaductal grey matter, the nucleus raphe magnus and the nociception inhibitory neurons within the dorsal horns of the spinal cord, which act to inhibit nociception-transmitting neurons also located in the spinal dorsal horn.

The nostrils are located on the dorsal surface of the snout, while the eyes and ears are located in a groove set just back from it ; this groove is closed when swimming.

Unlike the passive articulation, which is a continuum, there are five discrete active articulators: the lip ( labial consonants ), the flexible front of the tongue ( coronal consonants: laminal, apical, and subapical ), the middle – back of the tongue ( dorsal consonants ), the root of the tongue together with the epiglottis ( radical consonants ), and the larynx ( laryngeal consonants ).

The authors proposed that both thin ( pain ) and large diameter ( touch, pressure, vibration ) nerve fibers carry information from the site of injury to two destinations in the dorsal horn of the spinal cord, and that the more large fiber activity relative to thin fiber activity at the inhibitory cell, the less pain is felt.

However, movement is usually quite precise ; dorsal and anal fins aid in manoeuvring and stabilizing.

The uterus is located inside the pelvis immediately dorsal ( and usually somewhat rostral ) to the urinary bladder and ventral to the rectum.

The Molidae are conspicuous even within this oddball order: they lack swim bladders and spines, and are propelled by their very tall dorsal and anal fins.

Sharks, for example, have no dorsal ribs, and only very short ventral ribs, while lampreys have no ribs at all.

It is distinguished by a very small head and a very large dorsal fin.

Gigantactis is a deep-sea fish with a dorsal fin whose first filament has become very long and is tipped with a bioluminescent photophore lure.

The pike have a very typical hunting behavior ; they are able to remain stationary in the water by moving the last fin rays of the dorsal fins and the breast fins.

The male has a very tall, triangular and erect dorsal fin which is sometimes tilted forwards.

Since the ventral and dorsal spinal cord have separate blood supply with very limited collateral flow, an anterior cord syndrome ( paralysis or paresis with some preserved sensory function ) is a possible surgical sequela, so it is important to have monitoring specific to the motor tracts as well as dorsal column monitoring.

* Scales are very large but it is naked at the head with adult males developing fatty bumps in front of the dorsal fin.

These snakes are characterized by deep red dorsal saddle marks surrounded by very black borders.

The most distinctive characteristic of the bowfin is its very long dorsal fin consisting of 145 to 250 rays, and running from mid-back to the base of the tail.

They are grey, varying from dark grey at the top near the dorsal fin to very light grey and almost white at the underside.

The dolphin is characterized by its short thick creamy-white beak and very falcate ( curved ) dorsal fin.

All petaurids have obvious facial markings, a well-defined dorsal stripe, very large lower front incisors, and four-cusped molars.

Its dorsal fin is similar to Bryde's whale, being very falcate and rising at a steep angle ; but it is more rounded than the latter species, which usually has a much more pointed fin.

Their pectoral fins are quite small ; as a result they steer mostly with their dorsal and anal fins, which makes them very maneuverable, and they also use these fins to move with an exotic type of propulsion reminiscent of a propellor.

It is distinguishable by its very high first dorsal fin and inter-dorsal ridge.

Its dorsal fin is triangular and very high.

The dorsal fin base is very long and is not preceded by a fin spine.

The skull has an extremely narrow parietal with block like dorsal aspect, very broad, T-shaped frontals that form the " lateral wings " that Chatterjee applies to the lack of postorbitals.

It sits very close to the midline, at the same orientation of the midline, with head fibres more dorsal ( closer to the back ), towards the fourth ventricle.

Its dorsal pelage is very variable, but mostly grayish and paler ventrally ; its legs tend to be brownish or rufous.