Common name: slate pencil urchin

General information

The Red Slate Pencil Urchin, scientifically known as Heterocentrotus mamillatus, is a striking marine invertebrate that is popular among reef aquarium enthusiasts. This species is known for its thick, red spines that resemble pencils, which is how it gets its common name. These urchins are not only admired for their unique appearance but also for their role in the ecosystem as algae grazers.

Care

Caring for a Red Slate Pencil Urchin requires a well-established aquarium with plenty of live rock and algae for grazing. They are generally hardy but should be handled with care due to their sharp spines. It's important to maintain stable water parameters and provide ample space for them to roam without damaging more delicate corals or invertebrates.

Reproduction

Reproduction in Heterocentrotus mamillatus occurs through spawning, where males and females release their gametes into the water column. In the aquarium, breeding is rare, but hobbyists can encourage spawning by mimicking natural conditions such as changes in water temperature or lighting.

Habitat

The Red Slate Pencil Urchin is commonly found in the Indo-Pacific region, particularly in areas with strong water movement. They inhabit reef slopes and lagoons, often seen at depths where light is sufficient for the growth of their algal food sources.