““Fresh Fish High-quality fresh fish has firm, elastic flesh with a smooth, slippery slime and shiny surface. The eyes should be bulging and clear, the gills should be pink to bright red, and there should be no strong “fishy” odor. As fish deteriorates, the slime becomes more viscous (sticky) and grainy, the odor changes from smelling like seaweed to smelling like ammonia, and the flesh softens.Δ””