Although yellowing is not harmful, affected fillets take on a distinctive yellow colour, which when cooked turn pink. ... A tough texture is often associated with yellowing, which makes the fish objectionable to the consumer. “This research has looked into the reasons behind yellowing.

What color should haddock fish be?

The flesh of white fish such as cod and haddock is expected to be white, and even when it is only slightly darkened or coloured it may be rejected.

How do you know when haddock is cooked?

The best way to tell if your fish is done is by testing it with a fork at an angle, at the thickest point, and twist gently. The fish will flake easily when it's done and it will lose its translucent or raw appearance.