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| The Role of the Dorsal Fin |
 Just as the size and shape of people's eyes and noses differ, the overall form and "nicks" on the dorsal fin vary from orca to orca. The fin is the individual's most distinguishing feature. Importantly, the orca's dorsal fin helps to regulate their body temperature. Excess heat, generated as they swim along, is released into the surrounding water and air via the dorsal fin - much like a radiator! |
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