Frozen Jumbo Mysis Shrimp - Flatpack - 4 oz Hikari Bio-Pure Jumbo Mysis Shrimp are an extremely flavorful treat your fish won't be able to resist. Gutloaded with multi-vitamins, they are an excellent natural source of protein. Hikari's 3-step sterilization process ensures that Jumbo Mysis Shrimp are free of harmful parasites, unwanted bacteria, and foul odors. With stabilized Vitamin C.