This is an important one for many people to consider, as fish are notorious for being easy to spoil and start rotting.u003cbr/u003eu003cbr/u003eGenerally speaking, a properly stored piece of cod meat that has been cooked will for around 3 to 4 days if kept in the refrigerator.u003cbr/u003eu003cbr/u003eOnce your cod fish starts going gray or starts feeling slimy, then it needs to be disposed of.