3. Fillet or the whole fish?
According to the data provided by Oceana, only about 20% of all fish in stores is fake, and the easiest kind to fake is a fillet. For example, pollock is often sold under the guise of more expensive codfish. So, if you can choose, you should pick the whole fish. Another argument against buying fillet is the chemical mixture that some manufacturers keep it in to get rid of the bones.
If you decide to buy fillet anyway, buy the kind with skin, but before you go to the store, make you sure you know what the skin of different kinds of fish looks like. For example, codfish is grey with a green shade and a dark strip along the body.
4. How much frost should be on the fish and what might it indicate?
According to the law, the volume of the frost shouldn’t be more than 5% of the weight of the fish, but unfortunately, the information on the package is not always true. Hit the fish on something solid — if you notice cracks on the ice, then there is definitely more than 5% frost.
The way the ice looks can tell a lot about the quality of the fish. If there are cracks and clouds on the surface of the ice, it means that the fish was frozen and unfrozen many times. If the ice is yellow, it means that the fish is not fresh.