Why are echinoderms so successful?

Echinoderms are highly successful due to their unique structural adaptations, such as a water vascular system that facilitates movement and feeding. Their radial symmetry allows for effective interaction with their environment from multiple angles, enhancing their ability to exploit various niches. Additionally, echinoderms possess a remarkable capacity for regeneration, enabling them to recover from injuries and thrive in diverse habitats. Their diverse reproductive strategies, including both sexual and asexual reproduction, also contribute to their adaptability and resilience in changing ecosystems.