Whole brine shrimp gut loaded with spirulina algae and other natural algae, makes a quality, highly nutritious treat for all kinds of fish large and small. The gut-loading brine shrimp are packed with nutrients making it an ideal diet for new or finicky fish. Brine shrimp are commonly used to entice new, or finicky fish into eating frozen foods. Hikari’s Spirulina Brine Shrimp’s are gut-loaded spirulina algae which is renowned for its protein content, as well as containing all the necessary amino acids.