Why did my frozen tilapia turned orange?

Not many people are aware, but imported, frozen Tilapia is often treated with carbon monoxide (CO). This process is sneaky as it can help the fish look fresher for longer by delaying the oxidization of the meat, which is what causes fish to turn brown as it spoils.

Rest of the in-depth answer is here. In this way, how can you tell if frozen tilapia is bad?

The best way is to smell and look at the tilapia: signs of bad tilapia are a sour smell, dull color and slimy texture; discard any tilapia with an off smell or appearance.

Also, what color should tilapia be? Colors vary between black, red or gold. The most common species in the United States are the prolific Nile tilapia, the hearty blue tilapia and the red-colored Mozambique tilapia.

In respect to this, what color is frozen tilapia?

Tilapia isn't always perfectly white. It can look like yours does or it can even be slightly pink. If you plan to freeze your fish from the market, ask the person at the fish counter to get a package for from their freezer supply behind the counter.

Why is my cooked fish GREY?

As fresh or refrigerated fish ages and begins to go bad, the meat will take on a glossy, milky color. The milky parts of the fish may also take on a blue- or gray-ish tint. If you've already cooked your fish, it will not develop a milky color. This sign of expiration applies only to raw fish.