The red sea urchin (Mesocentrotus franciscanus) is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California. It lives in shallow waters from the low-tide line to greater than 280 m (920 ft) deep, and is typically found on rocky shores sheltered from extreme wave action in areas where kelp is available.

Strongylocentrotus franciscanus. Retrieved November, 05 2021, from en.wikipedia.org/wiki/Red_sea_urchin.