Common name: Luzon Sea Star

General information

The Red Knob Sea Star, Echinaster luzonicus, is a striking marine invertebrate known for its vibrant coloration and distinctive red tubercles or 'knobs' on its surface. This sea star is a popular choice among reef aquarium enthusiasts due to its unique appearance and relatively peaceful nature.

Care

In the home aquarium, Echinaster luzonicus requires a well-established tank with plenty of live rock and a sandy substrate to scavenge for food. They are generally considered safe with corals and sessile invertebrates, but they may disturb small, delicate polyps while foraging. A varied diet of meaty foods, such as chopped clams, shrimp, and squid, supplemented with detritus and algae, will help maintain their health.

Reproduction

Reproduction in Echinaster luzonicus is not commonly observed in the home aquarium. In the wild, they reproduce both sexually, by releasing gametes into the water column, and asexually, through regeneration if a limb is lost. In captivity, their reproductive habits are less understood, and breeding is considered challenging.

Habitat

The natural habitat of the Red Knob Sea Star includes coral reefs and rocky substrates in the Indo-Pacific region. They are typically found at depths ranging from shallow waters to about 100 meters. In the aquarium, they require stable water conditions with moderate to low water flow to mimic their natural environment.