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The caudal fin is the tail fin (from the Latin cauda meaning tail), located at the end of the caudal peduncle. It is used for propulsion in most taxa (see also body-caudal fin locomotion ). The tail fin is supported by the vertebrae of the axial skeleton and pterygiophores (radials).
The caudal fin, or tail, of a fish is the only fin to be connected to the vertebral column. It is the primary means of locomotion for most fish. Unlike many marine mammals with tails that use an up-and-down motion, fish generally use a side-to-side thrust of their caudal fin for propulsion.
Caudal Fin. The caudal fin is the primary appendage which is used for locomotion in many fishes. The caudal fin is also known as tail fin or a median fin which is usually homocercal or heterocercal. Generally, it is a vertically expanded structure which is located at the caudal end of the body.
This review describes the form and function of the caudal fin in the following groups: basal agnathans (hagfish [Myxinidae], lampreys [Petromyzontiformes], and conodonts), ostracoderms, placoderms, elasmobranchs, sarcopterygians, and basal actinopterygians, with a final focus on teleosts.
Caudal Fin. The caudal fin is the tail fin, which when it is asymmetrical (as in cartilaginous fish) is termed Heterocercal and when it is symmetrical (as in most bony fish) it is termed Homocercal. Dorsal Fin. The dorsal fin is one (but sometimes two) unpaired fin or fins, found on the upper surface, or back of the animal.
Shark tail fins, also called the caudal fins, are unique among all fishes. If you look at the top half of the fin, it is noticeably longer than the bottom half. This asymmetrical profile was common in many ancient fishes, but sharks are the only group to maintain the shape over a period of 350 million years. Scientists still debate the function ...
The caudal fin represents a fundamental design feature of vertebrates that predates the origin of jaws and is found in both agnathans and gnathostomes. The caudal fin also represents the most posterior region of the vertebrate axis and is the location where fluid, accelerated by movement of the body anteriorly, is shed into the surrounding medium.
Fin Spines (left) and Soft Finned Rays (right)
Caudal (Tail) Fin. The caudal fin is known commonly as the tail fin (Table 4.6). It is the primary appendage used for locomotion in many fishes. The caudal fin is also a median fin (Fig. 4.22 A). The caudal peduncle is the base of the caudal fin. Peduncle means stem, and the caudal peduncle is where the strong swimming muscles of the tail are ...
Fish with streamlined bodies and a stiff, crescent-shaped caudal fin or tail, tend to move rapidly through the water by swishing their tail from side to side. This action propels the fish much like sculling (rowing a boat with an oar) propels a boat.