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Shark tail11/4/2023 These characteristics favor the swimming efficiency of sharks, such as the whale shark ( Rhincodon typus), the basking shark ( Cetorhinus maximus) and the lamniform sharks. Also, lateral keels extend in the precaudal pit. The tails of these sharks that swim in open waters are crescent shaped, and their upper and lower lobes are similar in size. Sharks of the Carcharhinidae family own these tails as well as thresher sharks (genus Alopias), which have turned their tail into a powerful prey stun weapon. The upper lobe of its tails is longer than the lower lobe and turns upward at a moderate angle. The caudal fin forms can be classified as follows: For example, the Cookiecutter shark ( Isistius brasiliensis) has bioluminescence in the upper and lower lobes of the tail that serve to attract the prey. The thrust, velocity, and acceleration of the swim depend on the shape of the caudal fin, but some adaptations of the tail have purposes other than those related to swimming. Swinging it forward and backward to advance in the water, it pushes the water around the fins creating a movement that produces elevation. In the body, the tail functions as a propeller. In some cases, the spine extends to the tip of the superior fin, so the tail is called “heterocercal.” Each one consists of a precaudal pit and an upper and lower lobe. Each shark has a tail adapted to its physiology, its surroundings, and its lifestyle Therefore, there is a great diversity of types of tails.
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