Oven Baked Fish recipe In case you're eager to master the art of cooking fish, it's worth noting more than one foremost variations between fish and meat. appearance closely at a filet of clean salmon, cod, or halibut, and you may see pearly webbing among the striations of muscle. this is the connective tissue called "collagen," a structural protein that holds together quick, thick muscle fibers. In fish, muscle fibers are an awful lot shorter than they may be in beef, and collagen dissolves without difficulty for the duration of cooking. So fish cooks quickly and there is no tenderizing to do. In fact, the biggest task in making ready fish filets is to preserve them from falling apart after cooking.