Caudal

In particular, the fins immediately upstream of the caudal (tail) fin may be proximate fins that can directly affect the flow dynamics at the caudal fin.

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

However, in each case after this initial caudal movement there was a reversal of direction as the hip flexed to 90°, whereupon the PSIS rose.

After initially feeding on the whale caudal peduncle and fluke, the sharks would investigate the carcass by slowly swimming around it and mouthing several parts before selecting a blubber-rich area.

An additional caudal fin covers the post-anal tail.

At the posterior end, a hardened caudal shield is sometimes present in Aspidosiphon. citation Digestive system The digestive tract of sipunculans starts with the esophagus, located between the introvert retractor muscles.

Below the caudal vertebrae is the chevron bone ; the vortex developed provides additional attachment points for the tail musculature.

Cod have a distinct white lateral line running from the gill slit above the pectoral fin, to the base of the caudal or tail fin.

Coelacanths create thrust with their caudal fins for quick starts.

Finlets are found between the last dorsal and/or anal fin and the caudal fin.

It comprises at least four regions (left and right V4d, left and right V4v), and some groups report that it contains rostral and caudal subdivisions as well.

It is a common name for the oldest living line of Sarcopterygii, citation referring to the hollow caudal fin rays of the first fossil specimen described and named by Louis Agassiz in 1839.

It is divided into either spinal (injection into the subarachnoid space ), epidural (injection outside of the subarachnoid space into the epidural space) and caudal (injection into the cauda equina or tail end of the spinal cord).

Neck, lumbar and pelvic vertebrae are very reduced in number (only 2–10 lumbar and pelvic vertebrae are present), while only a short tail remains of the caudal vertebrae.

Pond tadpoles tend to have deep bodies, large caudal fins and small mouths; they swim in the quiet waters feeding on growing or loose fragments of vegetation.

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

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

Squamates and tuatara both show caudal autotomy (loss of the tail-tip when threatened), and have transverse cloacal slits.

The basal ganglia are located on the left and right sides of the brain, and have rostral and caudal divisions.

The caudal vertebra number may vary, even within species.