Common name: Sand Sifting Starfish

General information

The Sand Sifting Starfish, Archaster angulatus, is a popular detritivore in the reef aquarium hobby. This species is known for its ability to sift through the sand bed, consuming detritus, uneaten food, and decomposing organic matter, which helps to keep the substrate clean and aerated. They have a distinctive star shape with five tapering arms and a grey to brown coloration that blends well with sandy environments.

Care

Archaster angulatus requires a well-established aquarium with a deep sand bed to thrive. They are sensitive to rapid changes in water parameters, so a stable, mature system is crucial. These starfish are not aggressive and can be kept with a wide variety of tank mates. However, they should not be kept with predatory fish or invertebrates that may harm them.

Reproduction

In the wild, Archaster angulatus reproduces by broadcast spawning, where males and females release sperm and eggs into the water column. In captivity, breeding is less common but can occur in well-maintained systems with multiple individuals.

Habitat

Archaster angulatus is found in shallow waters across the Indo-Pacific region, often buried within or moving across sandy substrates. They play a crucial role in their natural habitat by turning over the sand, which promotes a healthy benthic environment.