What's the raw materials needed for aquatic fish feed?A significant majority of protein should come from named aquatic animals (fish, salmon, herring, krill, brine shrimp, plankton, squid) and plants (Spirulina, Kelp, Spinach, Algae, Vegetable Extract) and not from protein add-ons and fillers such as soy, wheat, and corn products, which should (ideally) be limited to no more than 20% of the food.