This disclosure provides CaCO.sub.3 and/or ZnO-loaded microcapsules for use as whitening agents in foods, beverages, supplements, pharmaceutic products, cosmetic products, and personal care products.

A conveyance system or method for conveying a crustacean to be injected with an injection treatment solution made from water and emulsified crustacean substrate of the crustacean being treated may include a crustacean stabilizing assembly configured to substantially maintain a position of crustaceans relative to a support surface of the conveyance system before, during, and/or after injection, wherein a first pocket defined by the crustacean stabilizing assembly is positionable beneath a first injector head, the crustacean stabilizing assembly supporting crustaceans in the first pocket during injection by the first injector head, and wherein the first pocket defined by the crustacean stabilizing assembly is positionable beneath a second injector head located downsteam of the first injector head, the crustacean stabilizing assembly supporting crustaceans in the first pocket during injection by the second injector head.

A conveyance system or method for conveying a crustacean to be injected with an injection treatment solution made from water and emulsified crustacean substrate of the crustacean being treated may include a crustacean stabilizing assembly configured to substantially maintain a position of crustaceans relative to a support surface of the conveyance system before, during, and/or after injection, wherein a first pocket defined by the crustacean stabilizing assembly is positionable beneath a first injector head, the crustacean stabilizing assembly supporting crustaceans in the first pocket during injection by the first injector head, and wherein the first pocket defined by the crustacean stabilizing assembly is positionable beneath a second injector head located downsteam of the first injector head, the crustacean stabilizing assembly supporting crustaceans in the first pocket during injection by the second injector head.

A method for extracting high-quality krill oil from krill includes the following steps: S1. performing extraction on krill with an organic solvent, and collecting an extracting solution; S2. adding alkaline water to the extracting solution to enable a free fatty acid to form a fatty acid salt to be separated from an oil phase, and performing oil-water phase separation and collecting the oil phase; and S3. purifying the oil phase to obtain the high-quality krill oil. In the present application, the preparation process for krill oil is optimized, organic solvent extraction and alkali refining are ingeniously combined, and process parameters are adjusted and optimized, thereby reducing the acid value of krill oil, and also ensuring the content of active ingredients such as phospholipid and astaxanthin in krill oil to the greatest extent, and improving the quality of krill oil.