Nature Field Guide
Crown Sea Urchin
- Spanish name
- Erizo corona
- Scientific name
- Astropyga pulvinata
What Do Pico & Tati Think?
One spiny animal is interesting. A gathering of them raises even more questions. Pico and Tati watch without moving closer.
Species overview
About the Crown Sea Urchin
Astropyga pulvinata is an urchin with long spines and distinctive bright blue spots on parts of its body. Research in Bahía Culebra documented seasonal gatherings. A past study describes one population under particular conditions; it does not predict where a family will find an aggregation today.
Identification
Key Features of the Crown Sea Urchin
Long slender spines
Small bright blue body spots may be visible
Observe without approaching the spines
Habitat & range
Suitable underwater coastal habitat. Use a permitted guided snorkeling or viewing activity appropriate to your family; do not enter the sea just to find this animal.
Local observations
Documented in Guanacaste. Also recorded at Isla del Coco (Oceanic Pacific); the museum checklist uses Ophiocoma alexandri for Ophiocomella alexandri. Region tags represent documented locations, not an exhaustive range or a promise of occurrence at every beach. Additional regional assignments require locality evidence.
When to observe
Visibility depends on the site, conditions and the animal. Ask a local guide about an appropriate visit; no fixed encounter season is promised.
Conservation & care
Watch without touching, lifting, feeding or collecting. Keep fingers and equipment away from spines and other surface structures. Leave the animal submerged and its habitat undisturbed.
Observation activity
If a group is visible from a suitable guided observation point, estimate its size before counting from a photograph.