FDA petitioned for safe use of  Paracoccus carotinifaciens in salmonid feed

Nippon Oil Corp. has filed a petition with the U.S. Food and Drug Administration (FDA) proposing that the color additive regulations be amended to provide for the safe use of Paracoccus carotinifaciens granules as a color additive in the feed of salmonid fish to enhance the color of their flesh.
See Federal Register docket

Read: Paracoccus carotinifaciens sp. nov., a new aerobic Gram-negative astaxanthin-producing bacterium
Akira Tsubokura, Hisashi Yoneda and Haruyoshi Mizuta, Central Technical Research
Laboratory, Nippon Oil Company Ltd, Yokohama,  Japan
International Journal of Systematic Bacteriology (1999), 49, 277–282 (PDF)