Oysters of the genus Crassostrea are extremely tolerant to both temperature and salinity in the culture environment. Interactions of these two factors on growth are shown in Figure 72. In both the Mangrove oyster, Crassostrea rhizophorae, and the Pacific oyster, Crassostrea gigas - and the same is true for the American oyster, Crassostrea virginica - growth, development and survival are near optimal at 28ºC and at a salinity of 25 PSU. Larvae will also tolerate salinities as low as 10 PSU but survival suffers at 5 PSU. Survival exceeded 80% in all treatments over the duration of the trials with the two species.