The octopus does a playful twirl. The camera zooms in slightly to focus on the three visible hearts, which light up in sequence as the narrator describes their function. Tiny bubbles float past the camera. Off-screen voiceover (all characters have their mouths closed, no one is speaking on screen): Narrator: "Fact #3: An octopus has three hearts! Two pump blood through the gills, and one pumps...
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