Common name: sheriff-badge sea star

General information

The Knobby Sea Star, scientifically known as Asteropsis carinifera, is a distinctive and attractive species that can add a touch of diversity to a marine aquarium. This sea star is characterized by its brown to tan coloration with darker brown to black knobs or 'chocolate chips' across its dorsal surface, which gives it its common name. It is a relatively small species, making it suitable for a variety of tank sizes.

Care

Asteropsis carinifera requires a well-established aquarium with a sandy bottom and plenty of live rock to scavenge from. It is an omnivore that will feed on detritus, small invertebrates, and occasionally coral polyps, so it may not be suitable for a reef tank with sensitive corals. Regular feeding with meaty foods and ensuring a clean environment with stable water parameters are key to its health.

Reproduction

In the wild, Knobby Sea Stars reproduce by releasing eggs and sperm into the water column, a process known as broadcast spawning. In the aquarium, however, reproduction is less common but can occur if conditions are ideal. Hobbyists should be aware that offspring may not always survive without specialized care.

Habitat

The natural habitat of Asteropsis carinifera includes coral reefs and rocky substrates in the Indo-Pacific region. They are typically found at depths where light is sufficient for the growth of benthic algae and small invertebrates, which form part of their diet.