A: The fish oil freezer test is a simple way to evaluate the quality of fish oil. In this test, simply leave the fish oil in the freezer overnight. As poor quality fish oil would contain a lot of saturated fat and very little omega-3, the contents would solidify and give an opaque appearance. On the other hand, good quality fish oils with high concentrations of omega-3, such as OmaxPure DHA76 would remain see-through even when it is frozen. This is because omega-3 fats have extremely low freezing points and hence, they do not solidify easily.