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Rocky Shore
Humans and the Rocky Shore
Sublittoral Zone
Littoral Fringe
Abiotic Factors
Midlittoral Zone
Food Chain
Sources used to make this website

Anatomy- Periwinkles are small and have a hard shell covering their soft boidies.  Their shell is swirl shaped. 
Diet- Periwinkles eat alage. 
Interesting fact- One interesting fact about periwinkles is that they are used to cleaqn tanks.