Common name: rock-boring urchin

General information

The Burry Sea Urchin, scientifically known as Echinometra mathaei, is a species of sea urchin that is popular among reef aquarium hobbyists for its algae-grazing habits. This species is characterized by its dark coloration, which can range from deep green to brown or reddish-purple, and its relatively small size compared to other sea urchins. The spines are short and may have banded patterns, which adds to its visual appeal in a reef tank setting.

Care

In the home aquarium, Echinometra mathaei requires a tank with plenty of live rock and a stable environment to thrive. They are excellent algae eaters and will help keep the tank clean by grazing on various types of algae. However, they should be monitored to ensure they do not overgraze on coralline algae or disturb other tank inhabitants. It's important to maintain proper calcium levels and stable water parameters to support their exoskeleton development.

Reproduction

Reproduction in Echinometra mathaei typically occurs through spawning, where males and females release their gametes into the water column. In the aquarium, breeding is less common, but with optimal conditions, it is possible to observe spawning behavior. The larvae are planktonic and go through several developmental stages before settling and metamorphosing into juvenile urchins.

Symbiosis

While not known for any specific symbiotic relationships like clownfish and anemones, sea urchins, in general, play a crucial role in the reef ecosystem. They help control algae growth and provide a food source for predators, maintaining a balance within the reef community.

Habitat

Echinometra mathaei is found in a variety of reef habitats, from shallow lagoons to deeper reef slopes. They prefer areas with plenty of crevices and hiding spots among the rocks. This species is widespread across the Indo-Pacific region, including the Red Sea, East Africa, and across to the central Pacific.