Editing Sea urchin (section)

=== Longevity ===
[[Red sea urchin]]s were originally thought to live 7 to 10 years but recent studies have shown that they can live for more than 100 years. Canadian red urchins have been found to be around 200 years old.<ref>{{cite web | url=https://www.aquariumofpacific.org/onlinelearningcenter/species/red_sea_urchin#:~:text=Southern%20California%20red%20sea%20urchins,probably%20about%20200%20years%20old! | title=Red Sea Urchin | access-date=2023-05-18 | archive-date=2023-05-18 | archive-url=https://web.archive.org/web/20230518000337/https://www.aquariumofpacific.org/onlinelearningcenter/species/red_sea_urchin#:~:text=Southern%20California%20red%20sea%20urchins,probably%20about%20200%20years%20old! | url-status=live }}</ref><ref name="Ebert 2003">{{cite journal |author1=Thomas A. Ebert |author2=John R. Southon |name-list-style=amp |year=2003 |title=Red sea urchins (''Strongylocentrotus franciscanus'') can live over 100 years: confirmation with A-bomb <sup>14</sup>carbon |journal=[[Fishery Bulletin]] |volume=101 |issue=4 |pages=915–922 |url=http://fishbull.noaa.gov/1014/19ebertf.pdf |access-date=2023-05-18 |archive-date=2013-05-03 |archive-url=https://web.archive.org/web/20130503065837/http://fishbull.noaa.gov/1014/19ebertf.pdf |url-status=live }}</ref>