Common name: Burrowing fine spine urchin

General information

The Plate Urchin, scientifically known as Echinostrephus molaris, is a distinctive species of sea urchin that is recognized for its flattened, disc-like shape and its molar tooth-like appearance, which is where it gets its common name, 'Molar Urchin'. This species is not as commonly kept as some other sea urchins in the aquarium trade, but it can be an interesting addition for experienced hobbyists looking to diversify their clean-up crew.

Care

Plate Urchins require a tank with plenty of live rock and algae for grazing. They are excellent algae eaters and can help keep the tank clean by consuming film algae and detritus. However, they may also feed on some coralline algae, which is often considered beneficial and aesthetically pleasing in reef tanks. It's important to ensure that there is enough natural food available, or supplement with seaweed or prepared urchin diets to prevent starvation.

Reproduction

Reproduction in Echinostrephus molaris is typical of sea urchins, with external fertilization where males and females release gametes into the water column. In the aquarium, breeding is not commonly observed, and the specific conditions required for successful spawning and larval development are not well-documented.

Habitat

The natural habitat of the Plate Urchin includes rocky reefs and rubble areas in the Indo-Pacific region. They are often found in shallow waters but can occur at depths of up to 30 meters. In the aquarium, they require similar conditions with plenty of hiding places and stable water parameters.