Van Brunt’s Sea Urchin: Echinometra vanbrunti A. Agassiz, 1863 is a species of sea urchin in the family Echinometridae. It is widely distributed throughout the tropical and subtropical eastern Pacific, from the Pacific coast of Mexico through Central America and offshore islands such as the Galápagos Islands. It is one of the most common sea urchins found in rocky coastal habitats along Mexico’s Pacific coast.
This species has a slightly flattened, rounded test that generally reaches around 7–8 cm in diameter. Its body color ranges from dark purple to black, and it is covered with sharp, moderately long spines. Like other members of the genus Echinometra, it is a rock-boring sea urchin that uses its teeth and spines to gradually excavate cavities in rocky substrates, where it lives and finds shelter.
Van Brunt’s Sea Urchin inhabits rocky reefs, tide pools, and coastal rocky shorelines from the intertidal zone to depths of approximately 50 m. Although it is most commonly associated with hard substrates, it may occasionally occur on sandy bottoms near rocky areas.
It is primarily a herbivorous grazer, feeding on algae growing on rocks and reef surfaces, while also consuming detritus and other organic matter. Through its feeding activities, the species contributes to the regulation of algal growth and plays a role in maintaining the ecological balance of nearshore marine environments.
Although Van Brunt’s Sea Urchin is not considered an important commercial seafood species and is rarely encountered in the international sushi trade, it is an ecologically significant species within eastern Pacific rocky reef communities. The cavities it creates often provide shelter for small fish, shrimps, crabs, brittle stars, and other marine organisms, contributing to local biodiversity.
Van Brunt’s Sea Urchin is not considered venomous to humans; however, its sharp spines can easily penetrate the skin, occasionally breaking off and causing pain or irritation. Careful handling is therefore recommended when encountering this species.
Related contents: