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I am able to taste a flavor in some fish (usually white fish) that most other people do not (I also can smell the asparagus pee smell, and am a strong taster ... but not supertaster?... of bitter flavors). What I would like is a way to predict whether a given piece of fish will have the flavor, so I can avoid it. I don't think that I can detect it as a smell. I find it unpleasant, but not intolerable. It doesn't seem to be a result of spoiling. At a guess, I'd say I encounter it in less than 20 percent of white fish. It occurs across species, so I might find it in cod, haddock, halibut, sole, etc. If I'm cooking up some fillets from the supermarket, that flavor might be in one piece, but not the next. My wife and I will often swap portions if I detect it in mine, and she notices no difference, where to me it's as obvious as if I'd popped a chunk of 80% dark chocolate in with a bite of fish. Not to imply that I dislike choco - I love it.

I don't ask everybody that I meet, so there might be others who detect this flavor, but I can't describe it, except... hmm... one-dimensional, the way a taste of metal would be one-dimensional... though it doesn't seem to be a metallic flavor either.

Anyway, would be obliged if somebody else knew what I meant, and especially if there's a way to tell if a piece of fish will be affected BEFORE I buy. Oh, and it's only in fish. No other food that I've encountered. Not affected by method of cooking. Not affected by seasoning. Anybody?

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Do you ever detect it in just part of a fish? ie. when you refer to swapping portions with your wife, would both portions be from the same fish, or does that occur in a situation where the pieces might be from different fish (ie. in a restaurant or from 2 separate packages)? –  Allison Mar 12 '11 at 12:52

6 Answers 6

I have had this problem and thought it was the taste of tin-foil that I used to rolled up and put into the belly of the fish to stand it up in the oven. So, I was very interested to hear an interviewer on the radio 3RRR in melbourne, talking to a chef who mentioned fish, like Snapper, are susceptible to that metalic taste if they are caught and die too slowly. The slower they take to die, the more stress the fish goes through and the stress hormone accumulates in the flesh particularly around the belly. I think they said a pinker snapper is better than a pale one for taste.

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It is probably the process of cutting and cleaning the fish. It must be cut in such a way that the stomach part of the fish which needs to be cleaned must come out easily and completely without spilling over. I mean to say that the unwanted stuff inside the stomach must be cleaned without smashing it. Once it gets smashed the bitter tasting substance in the stomach spreads where ever it touches. And then it cannot be cleaned by any means. The same is reflected on to the flesh pieces after cooking the fish making it difficult to eat. My grandmother used to be always cautious about it when ever fish is cleaned and over the period I experienced that this is the cause of bitter taste in fish.

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I had this problem about 25% of the time with Trader Joe's white fish. Also, certian beef at TJs. What I did was stop buying those particular pieces of meat from those vendors and try other stores. This method has reduced my finding bad tasting fish or meat to about 10% of the time. It also has led me to liking other meats and fishes.

I think you are looking for some technique that can be applied right then and there if you have the meat in hand. Unfortunately, this seems unlikely. Try other stores is my best answer...

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Mixed batches, usually from supermarkets, or fish stores. Occasionally from restaurants. It's not a flavor I've ever noticed in meat or veg or fruit or grain. Just in fish. I don't think I've even met it in other seafood, which I also enjoy (crab, lobster, scallops, clams, squid, etc.). Just mostly in white ocean fish, rarely in pink-fleshed fish. –  user5238 Mar 20 '11 at 21:17

My guess is this has something to do with the freshness of your fish. Read a little bit of McGee on the subject. I don't guess there is a way of predicting it.

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I've noticed the same taste in cod that I buy at Kroger (surprising since Kroger is fairly high quality when it comes to most of their food). Perhaps mine is an age issue as I buy it when it's marked down for quicker sale. It doesn't seem to matter how I prepare/cook the fish.

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My guess is the fish is contaminated. I just had cod that was bitter as hell and I cooked it plain. Its not supposed to taste this way. Maybe they are adding another preservative. Most of the people who think they are allergic to shrimp are not. They are allergic to sulfites which they put on the shrimp when they catch it to preserve it. A large percentage of the population is allergic to sulfites.

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