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 until it is frozen. If the fish oil contain a lot of saturated fat and very little omega-3, it would solidify and give an opaque appearance. On the other hand, fish oils with ultrahigh concentrations of omega-3, such as OmaxPure ® Omega-3 Fish Oil would remain see-through even when it is frozen. This is because omega-3 fats have extremely low freezing points, they do not solidify easily.