What is the biome of sea urchins?

Sea urchins primarily inhabit marine environments, predominantly found in rocky coastal areas, coral reefs, and kelp forests. They thrive in various oceanic biomes, including temperate and tropical zones, where they play a crucial role in the marine ecosystem by grazing on algae and contributing to the balance of underwater habitats. Their presence is essential for maintaining the health of coral reefs and preventing algal overgrowth.