Nature Field Guide
Rough Periwinkle
- Spanish name
- Caracol litoral
- Scientific name
- Echinolittorina aspera
What Do Pico & Tati Think?
A tiny pointed shell can be an excellent observation challenge.
Species overview
About the Rough Periwinkle
Periwinkles are small coastal snails. This species has a pointed spire, while its surface sculpture and colors can vary. Learning to notice small shells helps explorers look beyond the largest finds.
Explorer activity: Choose a small patch of rock to observe from a safe spot. Count the visible snails without touching them, then draw the smallest shell you can see.
Your discovery notes: Record the date, place and habitat, then add a sketch or photograph. If you cannot confirm the species, label it “unidentified shell” and keep your observations.
Identification
Key Features of the Rough Periwinkle
Small coiled shell with a pointed spire.
A large final whorl gives a compact outline.
Color and surface texture vary; use several features together.
Habitat & range
Rocky intertidal shore.
Local observations
Pacific Costa Rica: Bahía Panamá record. This supports regional inclusion, not a confirmed Tamarindo Beach sighting.
When to observe
Tides and conditions affect visibility. Let an adult or local guide choose a safe observation time; this card does not promise a seasonal sighting.
Conservation & care
Observe and photograph shells where they are. Leave living animals, occupied shells and empty shells in place. Do not pry animals from rocks, dig in mangroves or put fingers into shell openings. Explore with an adult or guide, follow site rules and stay clear of surf and slippery rocks.
Observation activity
Choose a small patch of rock to observe from a safe spot. Count the visible snails without touching them, then draw the smallest shell you can see.