Red Sea Urchin

Found in the cool, shallow waters of the Pacific Ocean, the red sea urchin (Mesocentrotus franciscanus) is a marvel of marine longevity. Many individuals are estimated to live well over 100 years, with some studies suggesting certain specimens may reach 200 years of age. They achieve this remarkable lifespan through negligible senescence, showing few signs of aging. Their continued growth and high reproductive output throughout their centuries-long life make them a critical and enduring component of their kelp forest ecosystems.