Oceans

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

More Questions from Oceans
Besides Greenland, what is the largest island in the Atlantic Ocean?
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Brine pools in the ocean have an unusually high level of what?
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What name refers to trips across the Atlantic Ocean?
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What is the length of the Caspian Sea?
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A common food for a sea turtle would be what?
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What two natural predators are known to prey on beluga whales other than humans hunting them?
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The government-sanctioned plan to sink ships in order to create reefs is referred to as what?
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Where in the U.S. would you find the Everglades?
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