We’re outplanting sea urchins in Waikīkī and talking about the importance of urchins in helping to control invasive algae with Wesley Dukes and Kimberly Fuller from the Hawaiʻi Division of Aquatic Resources. Then, we visit the sea urchin hatchery at the Ānuenue Fisheries Research Center and talk with hatchery lead David Cohen and his team—Matthew Lewis, Patrick Gorong, Sean Louie, and Lani Musselmen—to learn about the sea urchin hatchery and what makes it an innovative part of aquaculture in Hawaiʻi.