The dorsal fins keep the shark :upright:, i. If there is a second dorsal fin, it is much smaller and positioned further down the torso, in line with the pelvic fin. Some sharks present with spines on their dorsal fin s. Not all shark species present with an anal fin. It is situated between the pelvic fins and the tail on the bottom of the body the ventral side. These are also used for stability.
Caudal Fins are also known as the tails of sharks. The animal swishes this fin from side to side in order to propel its entire body forwards. The nature of this fin does not allow for backwards movement. Therefore, if a shark needs to move away from an object, it is forced to either drift backwards or to turn away from it and continue in a forwards direction. A shark is required to move swiftly and without being detected to allow it to hunt prey effectively.
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