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Bat Star - Asterina miniata
Photo by Kathy DeWet-Oleson

Bat stars can be identified by their flattened yellow-orange/red colored bodies, from which four to nine stocky arms protrude outward from their centers. Similar to other sea stars, this species has thousands of small suction cups on the underside of each arm, which help propel them across the seafloor in search of food. Bat stars are one of the most abundant sea stars on the west coast, especially in Channel Islands National Marine Sanctuary.

Bat Star
(Asterina miniata)

Sitka, Alaska to Isla Cedros, Baja, California

The sandy bottoms of the intertidal zone to 300 meters (900 ft).

Clams, crabs, and fish


The status of this species is representative of the populations within the waters of this Sanctuary only, not global populations.

Quick Fact
A commensal worm, ophiodromus pugettensis, lives on the underside of the bat star.

Learn More
- Monterey Bay Aquarium
- Monterey Bay National Marine Sanctuary