Red sea urchin (Mesocentrotus franciscanus).Red sea urchins (Mesocentrotus franciscanus) show no age-related decline in reproduction or age-dependent changes in mortality rate, suggesting they might not age. Using 14C dating, Ebert and Southon (2003) estimated that urchins they sampled in the wild were as much as 200 years old. A large urchin weighs about 300g — about the same as a box of pasta.

Read more about urchin aging in the Successful Aging library.