Common name: Giant Sea Star

General information

The Giant Sea Star, scientifically known as Thromidia catalai, is a large and impressive invertebrate that can be a striking addition to a spacious marine aquarium. This species is known for its size and the unique, bumpy texture of its upper surface, which is covered with numerous small, rounded granules. The coloration of Thromidia catalai can vary, typically displaying hues of green, brown, or gray, which helps it blend into the natural reef environment.

Care

Caring for a Giant Sea Star requires a well-established aquarium with stable water conditions and plenty of live rock for grazing. They are generally peaceful and can coexist with a variety of tank mates. However, due to their size and feeding habits, they are best suited for larger systems where they have ample space to move and access to a steady supply of microorganisms and detritus to feed on.

Reproduction

Reproduction in Thromidia catalai is not commonly observed in the home aquarium. In the wild, they reproduce by broadcast spawning, where males and females release sperm and eggs into the water column, respectively. The fertilized eggs then develop into free-swimming larvae before settling onto the substrate and growing into adult sea stars.

Habitat

Thromidia catalai is found in the Indo-Pacific region, particularly around coral reefs and rocky substrates. They are typically found at depths where light is sufficient for the growth of benthic algae and other microorganisms that they feed on. Hobbyists should aim to replicate these conditions to provide a suitable environment for the Giant Sea Star.