Raw is best, but cooked will be fine. I used to do this a while back when I had huge hungry fish. I would leave the mussels out though as they tend to have a high heavy metal content. Throw in some children's multivitamin (liquid), some some minced garlic, a bar of cyclopeeze, a few sheets of nori and blend it all together very fine. Then add some krill for the larger fish to find something bigger they recognize too. Freeze it in flat zip lock bags and you are good to go.