Common name: Green Urchin

General information

The Green Urchin, Echinometra viridis, is a small to medium-sized sea urchin commonly found in the Caribbean Sea. It is known for its vibrant green coloration and its role in maintaining the health of coral reefs by grazing on algae. This species is relatively hardy and can be a beneficial addition to a reef aquarium, provided that its natural behaviors and requirements are respected.

Care

In the aquarium, Echinometra viridis requires a tank with plenty of live rock and a stable environment. They are herbivores and will graze on algae growing on the rocks and glass. It's important to ensure that there is a sufficient amount of algae present, or to supplement their diet with seaweed or prepared foods for herbivores. Overfeeding should be avoided as it can lead to water quality issues.

Reproduction

Green Urchins reproduce by releasing their gametes into the water column, where fertilization occurs externally. In the home aquarium, breeding is not common, but with optimal conditions, it is possible to observe spawning behavior. The larvae are planktonic and would require specialized care to raise successfully.

Symbiosis

Echinometra viridis does not have any specific symbiotic relationships that are of particular interest to the aquarium hobby, but it plays a crucial role in the ecosystem by controlling algae growth, which can benefit other inhabitants by maintaining a balance in the tank.

Habitat

This species is typically found in shallow waters, often in crevices or under rocks during the day. They are most active at night when they emerge to feed. In the wild, they are distributed throughout the Caribbean Sea and the western Atlantic Ocean.