Appearance: An oval shell with no distinct spire. The shells varies in colour from green to orange.
Depth: On brown algae chiefly in middle shore.
Feeding: Flat periwinkle is a consumer. It is a herbivore scraping feeding on the algae that it lives on.
Environment: This periwinkle is found wherever the brown algae that it lives on grow.
Other facts: This snail varies in colour with the algae that it lives on. This provides camouflage. The snail can live up to three years.
Classification: Rough periwinkle is a member of the invertebrate animal group mollusca.