Cresswell Shearer, FRS (24 May 1874 – 6 February 1941), was a British zoologist and Cambridge lecturer in Experimental Embryology, where he motivated his students to develop a keen interest in hands-on research, inviting them to practical marine research experience at Plymouth Laboratory of the Marine Biological Association of the United Kingdom during the summer months. It is also where he and Dorothy Jordan Lloyd worked as early pioneers on how to rear parthenogenetic sea-urchin larvae through metamorphosis. He also conducted research there with Harold Munro Fox and Walter de Morgan on the genetics of sea urchin hybrids.