Common name: Asterina Starfish

General information

The Asterina Starfish, scientifically known as Asterina anomala, is a small and often overlooked inhabitant of reef aquariums. These starfish are typically less than an inch in diameter and come in a variety of colors, including shades of brown, green, and occasionally blue. They are known for their ability to reproduce quickly and can become quite numerous in a tank if conditions are favorable.

Care

Asterina Starfish are generally considered beneficial as they consume algae, detritus, and uneaten food, helping to keep the tank clean. However, some hobbyists report that they can nibble on corals, particularly soft corals and zoanthids, if present in large numbers or if other food sources are scarce. It's important to monitor their population and remove excess individuals if necessary.

Reproduction

Reproduction in Asterina anomala is both sexual and asexual. They can reproduce by releasing gametes into the water column or through fission, where an individual splits into two or more new starfish. This asexual reproduction can lead to rapid population increases in aquariums.

Habitat

In the wild, Asterina Starfish are found in a range of habitats from intertidal zones to deeper waters. They are adaptable and can be found on rock surfaces, within crevices, and amongst algae. In the aquarium, they tend to hide during the day and become more active at night.