Fish Tank Life

Jawless fish lack both scales and jaws and are the last survivors of the world's first what?

	Vertebrate animals (back-boned).
	Large animals (big-boned).
	Invertebrate animals (no back-bone)

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Here are some quick tips to remember when you are looking to buy a fish tank (the glass or plastic aquarium only):

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Here are some quick tips to remember when you are looking to buy a fish tank (the glass or plastic aquarium only):