If the fish eyes are clear, the fish is fresh. If the eyes are cloudy, the fish is getting old.

The rule of thumb for cooking fish is to cook 10 minutes per inch of thickness.

Fresh fish does not have a strong fishy smell. Rather it has a delicate smell.

The fresher the shrimp, the harder the shells. Shrimp that is old or has been frozen has soggy shells.

In very fresh shrimp, the vein can be pulled out in one piece. As the shrimp ages, the vein begins to break down.

Fresh fish fillets have a supple, shiny appearance (similar to a raw chicken breast). As the fish ages, the shine disappears, and the fillets appear dull (similar to a cooked chicken breast).