Why is this Surume Ika (Japanese Flying Squid) discolored? (Ingredient for Ika Somen.)
Just killed squid is white, but while death processes continue after defrosting internal organs and inner skin get reddish. It's still possible to eat it even for sashimi though it will be not tasty enough but absolutely fine for cooking.
At least this is according some japanese Q&amp;A sites like this one http://oshiete.goo.ne.jp/qa/4199049.html

Most of fresh fish has almost no smell by the way.