The inside of an animal’s mouth may ACTUALLY be the gateway to hell.

10. Penguin

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9. Leatherback Turtle

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8. Camel

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7. Humpback Whale

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6. Hippopotamus

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5. Cat

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4. Sheepshead Fish

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3. Promachoteuthis Squid

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2. Snake

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1. Sea Lampreys

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