Animals

Which small sea animal is considered to be a link between vertebrates and invertebrates?

More Questions from Animals
Which species can be described as a wild pig from Africa?
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What is the most venomous snake in the world?
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What animal is easy to notice because of its bold black and white stripes?
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What is a common term for people that like staying up late?
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What breed of penguins lives closest to the equator?
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According to pop culture myth, what animal do elephants fear?
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What collective name is used for a group of cockroaches?
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Which primate, from the mountains of Japan, keeps warm in winter by bathing in hot volcanic springs?
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