so, you "lovingly" punch a steel bolt through mum's/dad's cheek; "lovingly" torture mum/dad for 10-20 min.; "lovingly" drag them underwater (or, other lethal environment) for an extended egocentric netting/matting/measuring/weigh-in/photo-op; then, magnanimously release them back into their living room ???
all you 100% C&R guys torture living creatures for your own entertainment -- ADMIT IT & LIVE WITH IT!!! At least, I can tell myself I'm 90% honing my hunter/gatherer skills, for a 10% harvest. Admittedly, anglers' ASTRONOMICAL financial impact heavily contributes to the protection/maintenance of said living creatures' habitats (so they have a place to thrive, to begin with) -- that's enough to assuage anyone's guilt & I'll get off my Devil's Advocate soapbox, before I get started on the laughable notions of "carp care"
...back to table-worthiness:
ALL the cypriniformes I've tasted (dozens & dozens of species) had sweet, mild, flaky, white meat riddled w/ intramuscular bones -- too inconvenient for most prissy, spoiled Westerners; excellent table fare for the rest of the World. Carp are no different, but they are among the biggest, most voracious & long-living omnivores, so they will taste like their environment (progressively more so, w/ size). It may be tough to find unpolluted waters where the mud they root in & vegetation they eat has no strong/unpleasant odor/flavor. An excellent indicator of good "eatin' waters", is a large healthy crayfish population.
red muscle; aka, grey meat; aka, blood line; aka, lateral line, is essentially a sensory organ w/ much more blood flow, nerve endings & oil -- it's a softer, more delicate, stronger-flavored meat. I rather like it in smaller fish, well-stored & cooked soon after capture, but it spoils MUCH faster then the rest of the fish (hence, the fishy reputation) -- best to cut it out of bigger fish, stored longer (esp., for grinding/fishcakes)
for all the "bone-dissolving" techniques/recipes (scoring/frying, canning, baking), research what Mid-Westerners do w/ suckers -- plenty info. out there... works fine for carp <10# (pref., <5#)