Common name: comb star

General information

The Sand Sifting Starfish, Astropecten polyacanthus, is a species of sea star that is popular among reef aquarium hobbyists for its ability to clean and aerate the sand bed. It is characterized by its multiple spines and a variety of colors, typically ranging from grey to brown, with a pattern that helps it blend into the sandy environment.

Care

This starfish requires a large, well-established sand bed to thrive, as it feeds on microorganisms, detritus, and small invertebrates found within the substrate. It is important to ensure that the aquarium has a sufficient and replenishable food source to sustain the Sand Sifting Starfish's diet. Over time, if the food supply is inadequate, the starfish may starve.

Reproduction

In the wild, Astropecten polyacanthus reproduces by releasing eggs and sperm into the water column, where fertilization occurs externally. In the aquarium, breeding is less common but can occur if conditions are favorable.

Habitat

The natural habitat of the Sand Sifting Starfish includes sandy bottoms and seagrass beds in shallow waters. They are commonly found in the Indo-Pacific region, from the Red Sea to the western Pacific. In the aquarium, they help maintain a clean sand bed by constantly turning over the substrate, which prevents the formation of dead spots that can harbor harmful anaerobic bacteria.