On June 21, 2021 a three-student team from the Fall 2020 Constructed Ecologies class presented their project Urchigami at the 2021 BioDesign Challenge. This was the third consecutive year that the class, taught by Margaret Ikeda and Evan Jones, entered the competition. The project explored folded shell designs and biocementation using calcium carbonate and living algae. The team consisted of Geetika Rohra (MArch’21), Nidhi Patel (BArch’21), and Lina Kudinar (MArch’21). Working in consultation with previous collaborators at UCSF microbiology labs and environmental engineering professor Dr. Varenyam Achal from Guangdong Technion – Israel Institute of Technology, the project was developed in the spring semester and featured on the SeaShift Collaborative website (seashift.org)