Cobalt International - Marine Vegi Flakes 3oz. Aquarium: Flake Fish Food Cobalt Marine Vegi flake is a complete formula for all marine herbivorous fish. Highly palatable formula helps finicky marine fish to eat prepared foods. Loaded with spirulina, plankton and squid for consistent growth and superior color. All Cobalt Flake foods feature Cobalt's BLUE flake, which has triple concentration of vitamins that help support a healthy immune system.