javascript - How does one move html elements with scroll? -

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I want to create a scroll behavior such as what can be found. If you scroll down the page, you will notice crabs, sharks, waves etc. whenever the page moves. How can this be achieved? Is this a script or css animation?

Edit: Text bubbles also appear in different scrolling points and disappear.

If you need a more robust jQuery script to help you: According to the answer: < / P>

Justin recommended a small more complete fat solution than already

...

(by answer) < / P>

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