I bought flounder yesterday morning, and it didn't smell fishy. I then steamed it with a little black pepper and pureed it for my baby to eat. Stored it in the fridge. Took some out for her dinner, smelled ok. Now today I'm about to give her some for lunch again, but it smells horrible! Fishy and disgusting. I know that fishy smelling raw fish is a sure sign it's not fresh, but what about one-day old cooked fish? Is that just what fish does after it's been cooked? Or is it rotten?