Animals

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

More Questions from Animals
Which of the following animals cannot jump?
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What animal lives in the northern Pacific Ocean?
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Which animal roars?
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In the famous story by Dr. Seuss, what was the turtle's name?
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What is a common term for people that like staying up late?
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What unusual feature does a polydactyl cat have?
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The main physiological difference between rays and skates is?
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Which breed of dog is known as "The Little Captain"?
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