San Francisco Bay Freeze-Dried Plankton (113 g) – Whole plankton in a freeze-dried form that serves as a nutritious food for medium to large fish and aquatic invertebrates. Plankton are naturally high in protein and healthy lipids, making them an excellent energy-rich supplement or treat to a regular diet. They’re also packed with beta-carotene, a natural pigment that enhances fish coloration. This all-natural product retains the nutrition of live plankton without the mess or need for refrigeration, helping to maintain fish vitality and brilliant color while stimulating the appetite of finicky eaters in both freshwater and marine aquariums.