Fish Facts

What are the three main groups of fish?

	Jawless, cartilaginous and bony fish.
	Cartilaginous, cat fish and cray fish.
	Turtles, horses and pigs.

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Aquarium Buying Guidelines and Information ( 2 items ) When you're looking to buy a new fish tank there are a few things you should keep in mind. An aquarium can be a large purchase, especially nowadays when every store is bundling an assortment of things together into one big fish tank package.