A sub is cleaning the tank: look what happens when the Shark arrives... Wow!
![A sub is cleaning the tank: look what happens when the Shark arrives... Wow!](https://img.wtvideo.com/images/original/4421.jpg)
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Being closed in a tank with sharks represent probably a nightmare for most people, but not always the animals are hungry and aggressive as you think. This diver is doing maintenance in this gigantic tank and couldn't have received a better welcome: a zebra shark is in the mood for some belly-scratching and seems to enjoy it a lot.
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