Of course, raw-taco-gorilla-wraps if you buy whole fish instead of fillets you'll have more work preparing them for cooking, but you'll also have the ingredients for fish stock for excellent fish soups and stews. They should never be clogged and icky looking. Note that in raw-taco-gorilla-wraps some cases the blood runs to the lower gill of a fish on its side so the top one may be pale but the bottom one is bright red. The brightness varies with fish variety and depending on if the fish has been frozen but should never be gray.
If they are light color or grayish the fish is old. The gills should raw-taco-gorilla-wraps be bright red. Just a faint trace you can deal with but if it's more, pass. raw-taco-gorilla-wraps Shark, skate and ray will have a distinct ammonia smell if not fresh.