Bat sea stars are found along the Pacific coast from Alaska to Mexico. They are named for the webbing between their arms, which creates a bat-like appearance.
The life of a bat sea star
Bat sea stars can grow up to eight inches around. They usually have five arms but can grow anywhere from four to nine arms. Their lifespan varies from five years to 35 years. They are typically a shade of red or orange but can be found in a variety of other colors.
Bat sea stars are omnivorous scavengers. They feed on eelgrass, algae, small invertebrates and other sea stars. Their mouths are located on their underside. To eat, they extend one of their two stomachs outside of their mouths and digest food externally. When feeding in groups, they sometimes attach themselves to a large decaying animal and eat the remains together.
Bat sea stars are commonly found in areas of shallow water but can live at depths of more than 950 feet. They ward off predators by releasing powerful chemicals that cause attackers to flee. Predators include other sea stars, mollusks and crustaceans.
Bat sea stars at the zoo
Located in the Steller Cove area.
