Genus
Common name: Sand Sifting Starfish
Scientific name: Archaster
Archaster is a genus of sea stars commonly known as Sand Sifting Starfish. These starfish are popular in reef aquariums for their ability to consume large amounts of detritus and uneaten food, thereby helping to maintain a clean sand bed. They are characterized by their five arms and a grey to brown coloration, blending well with sandy environments. Hobbyists should note that they require a well-established tank with a deep sand bed to thrive, as they feed on microorganisms and organic matter within the substrate.