what is the grey stuff on salmon
Report Abuse. I think the grey stuff you are referring to is the skin, which is absolutely deliscious. If you love salmon, make an effort to find fresh, wild salmon. It is no comparison to what you buy in the market.Farm raised salmon is born and raised on a farm...no flavor.es, I think the grey stuff is the best part. It's full of the salmon oil. It's just part of the meat of the fish. You can eat the skin too, just be sure it doesn't have scales. It's good if you fry it until it's crispy, it's not so good when it's limp.