How is a fish market different from the ocean? Where do they get theirs from? Many people arn't understanding the reason not to cook. Cooking destroys many of the good nutrients in the fish or meat because of the heat. It breaks down enzymes and nutrients. Steaming/Boiling especially, most nutrients are left in the water and not in the meat.
Store it frozen and you should not have a problem with any parasites or nasties. Whatever kind of seafood you feed, make it raw from the ocean.
FW species lake the nutrients like the
SW species.
Would i feed my fish only shrimp? No of course not, a varied diet is best, but Shrimp is a great addition IMO. Never once have I seen anything go wrong feeding raw shrimp. Seen fish that didn't like them, but never a fish that died from eating them. FOOD for thought (

), what do your major aquariums feed? Raw fish/shrimp. You're fish cooking dinner in the wild? Raw fish/shrimp.
Am i saying you can't feed it cooked? No, not at all. But you are better off feeding it raw. Salmon, Tuna, Cod, Shrimp, Scallops, Clams...they're all good for fish. Be sure to still feed your flakes/pellets too!
I personally think we as fish keepers, and especially around here are way to quick to boil something to "disinfect" it. Just my opinion of course as I have never boiled ANYTHING in my 10+ years in the hobby that went into my fish tank. Wood, decorations, or food.