Periwinkle Snails
ExploreInvertebrate
Periwinkle Snails
Littorinidae
Periwinkle snails are small, colorful snails that live on rocky shores. They have spiral shells that can be blue, gray, or brown, and they love to munch on algae!
Habitat: Coastal areas
Appearance
The Periwinkle Snails has a sturdy, conical or turban-shaped shell that typically ranges from grey, brown, or black to olive green, sometimes featuring subtle banding. Its small size and smooth, often dull, exterior help it blend into rocky shorelines. This distinctively robust shell visually sets it apart from more delicate land snails.
KingdomAnimaliaPhylumMolluscaClassGastropodaOrderLittorinimorphaFamilyLittorinidae
Category
InvertebrateRarity
Common
Danger
1/5 · Very low
Snaps
Be the first to snap!
Interesting facts
Periwinkles can detect predators just by sensing chemicals in the water!
Some periwinkle snails can live for five years or even longer in the wild!
Their tongue, called a radula, is covered in thousands of tiny teeth for scraping algae!
They leave a slimy trail wherever they go, like a secret map only they can follow!
Special abilities
Ability
Rock Grippers
Periwinkle Snails can hold onto rocks incredibly tightly because of their strong muscular foot that helps them resist crashing waves.
Ability
Tide Adapters
Periwinkle Snails can seal their shell opening with a trapdoor (operculum) that helps them survive when the tide goes out.
Ability
Shell Shield
Periwinkle Snails has a thick, calcified shell that helps them protect against predators and harsh environmental conditions.
Measurements & details
- Size
- 10-25 mm
- Lifespan
- 365-1825 days
- Leg Count
- 0
Diet & Feeding
These tiny ocean grazers munch on microscopic algae and tiny plant matter found on rocks.
Primary Foods
- algae
- diatoms
- microscopic plant matter
- biofilm
Foraging Method
- Grazing
Ecological connections
eaten by
Herring Gull
Larus argentatus
Gulls drop periwinkles from height to crack their shells.
eaten by
Green Crab
Carcinus maenas
Crabs use their strong claws to crush periwinkle shells.
eats
Sea Lettuce
Ulva lactuca
Periwinkles graze on this common green algae on rocks.
Traits
Solitary
Solitary animals live alone for most of their lives, only interacting with others for mating or parental care.
Colorful
Colorful describes organisms or objects displaying a wide range of bright and distinct colors.
Herbivorous
This trait characterizes organisms whose diet consists entirely or primarily of plant material.
Decomposer
Describes organisms that break down dead organic material, recycling nutrients back into the ecosystem.
Coastal
Coastal habitats are dynamic environments located along the interface between land and sea, influenced by tides, waves, and saltwater.
Diurnal
Diurnal animals are primarily active during daylight hours, typically resting or sleeping at night.
Marine
Marine habitats encompass all saltwater environments of the Earth's oceans, supporting an immense diversity of aquatic life.
Also known as
Rock Snail
Collections
Safety
Danger
1/5 · Very low
Don't touch snails you find outside; they need to stay in their homes!
Frequently Asked Questions
How big is Periwinkle Snails?
10-25 mm
How long does Periwinkle Snails live?
365-1825 days
What does Periwinkle Snails eat?
These tiny ocean grazers munch on microscopic algae and tiny plant matter found on rocks.
Where is Periwinkle Snails usually found?
Coastal areas
How does Periwinkle Snails hunt?
Grazing
How many legs does Periwinkle Snails have?
0
Snap Map
Zoom in to split clusters and explore where this object has been snapped.
Loading map…
Recent Snaps
Recent snaps will appear here as new observations are added.
