Another stressor is an increase in water turbidity. This turbidity increase can result from a myriad of issues like untreated wastewater and beach erosion activities. Elkhorn coral live within very shallow regions, enabling their photosynthetic zooxanthellae to receive much light. When waters become turbid, or cloudy, access to this light is impeded. With less available light, less photosynthesis occurs, and thus zooxanthellae produce less oxygen. As stated earlier, most of the oxygen coral receive is from their zooxanthellae, so without this oxygen, Elkhorn coral can quickly suffocate and die.