heart-pumping, the king of the ocean food chain

Bonfil's capture technique includes a heart-pumping face-to-face meeting with the king of the ocean food chain.

Does it mean a frightening exciting and nervous experience which make your heart beat fast?

And since the article is talking about white sharks. So I guess "the king of the ocean food chain" may mean white sharks. Do you call them so?

White pointers/Great Whites are considered "apex predators" meaning that there aren't too many other species that prey on them.

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White pointers/Great Whites are considered "apex predators" meaning that there aren't too many other species that prey on them.

I didn't think there were any?