Invertebrates
Chocolate Chip Sea Star
Protoreaster nodosus · also called horned sea star
A chocolate chip sea star moves slowly across a shallow seagrass bed, its pale body studded with dark, cone-shaped bumps that make it look almost good enough to eat. Its actual appeal, at least to aquarium keepers, is exactly that resemblance.
Overview
The chocolate chip sea star, Protoreaster nodosus, is a distinctively marked, armoured sea star native to shallow tropical waters across the Indo-Pacific region. Its chocolate-chip-like bumps and relatively hardy nature have made it one of the more popular and recognisable sea star species in the marine aquarium trade.
Popularity with a cost
The same striking appearance that makes the chocolate chip sea star so appealing to aquarium keepers has also driven localised overcollection in parts of its range, a familiar tension between a species’ visual appeal and its wild population’s ability to sustain that demand.
Status
Not Evaluated — present across much of its broad Indo-Pacific range, though localised declines have occurred in areas facing intensive aquarium-trade collection.
Chocolate Chip Sea Star: common questions
Why is it called the chocolate chip sea star?
A chocolate chip sea star displays rows of dark, cone-shaped bumps across its pale body surface, an appearance that closely resembles chocolate chips studded across a biscuit, a visual resemblance directly responsible for the species' common name and its popularity in the aquarium trade.
How does the chocolate chip sea star eat things bigger than its mouth?
Like many sea stars, a chocolate chip sea star can extend its stomach outside its own body to digest food externally, a feeding method that allows it to consume prey and organic material too large or awkward to otherwise ingest whole, digesting food before drawing the nutrients back inside.
Is the chocolate chip sea star endangered?
The chocolate chip sea star has not been formally assessed for conservation status, though localised population declines have been reported in some heavily collected areas due to demand from the aquarium trade and curio market, raising sustainability concerns in specific regions even though the species remains present across much of its broader range.
Where does the chocolate chip sea star live?
The chocolate chip sea star is native to shallow tropical coastal waters across the Indo-Pacific region, generally found on sandy or seagrass-covered seafloor habitat where it moves slowly in search of sponges, detritus, and algae to feed on.