The ocean will have oxygen holes (large areas of oxygen depletion). (pathsoflight.us)
However, when tofu whey is discarded as an untreated waste, it creates environmental pollution as the protein and soluble sugars in the whey could contribute to oxygen depletion in the waterways. (sciencedaily.com)
As far as being concerned about oxygen depletion, I'm not. (realclimate.org)