Invertebrates are animals without a backbone or spinal column. 

Shrimp: Shrimp have 8 pairs of legs 5 for swimming and 3 for feeding. Also 2 pairs of antennas they use for tasting and smelling to find their food.

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 Starfish: On the bottom of the starfish it has small tube feet to help with moving and feeding. Also the starfish has 2 stomachs in its mouth!

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Worms: The ribbon worm can grow up to 100 feet in length! Also there is a worm called a parasite. It lives in the human body.