Oceans

What is the funnel-shaped opening beneath an octopus's head that secretes a black fluid when threatened?

More Questions from Oceans
What is the third largest ocean in the world?
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What animal is a meat-eating, freshwater fish?
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Giant kelp can grow up to which length per year?
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Who was the manufacturer of the World's first outboard engine?
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What ocean lies between Africa and North and South America?
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What part of kelp holds it to the ocean floor beneath it?
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What's the name for the scientific study of bodies of fresh water?
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The Bering Strait lies between which two continents?
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