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On the backs of fish and many whales, which cuts through the waters surface . The beluga doesnt have one. This whale lives far to the north where its very cold and where, more often than not, this hardy white whale finds itself swimming under arctic ice sheets. Quite frankly, a dorsal fin would get in the way or worse, scraped up, or off. So no dorsal fin. But that doesnt mean that only this individual beluga whale doesnt have one and that this other beluga whale does. No, all beluga whales have adapted to have no dorsal fin. This is not something that they decided as individuals no matter how intelligent they might be. But its something that nature decided for them, in a manner of speaking. Physical adaptations during an animals life span but over many generations, and these changes to an animals body almost always result as a response to one of three things one, factors in the animals habitat, which is where it lives. These factors include adapting to the climate as in the case of ou

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