o. aureus o. aureus o. aureus may refer to: oreochromis aureus, a species of fish also known as the blue tilapia. ornithinibacter aureus, a gram-positive bacterium. thomasomys aureus, a species of rodent formerly known as oryzomys aureus. this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.