KnipBio, a Massachusetts-based biotechnology company, has developed a series of microbes that converts low-cost feedstocks into premium, nutritious, single-cell proteins that are an alternative to fishmeal in aquaculture. Its fermentation process yields a protein flour that is laden with immunity-boosting, pigment-enhancing carotenoids to produce healthier, more vibrant fish. Ethanol is one potential feedstock of the multiple streams that serve as nutrition for the KnipBio microorganisms. All forms of ethanol are being evaluated, including hydrous, neat and beer.