AMD Linux graphics driver developers use(d) their own naming scheme (separeate from the hardware codenames) for RDNA2 GPUs based on X11 colors and fish names to make it harder to speculate on unreleased hardware based off the open source drivers. This gave us Sienna Cichlid, Navy Flounder, Dimgrey Cavefish, Beige Goby and Yellow Carp. It seems they stopped doing that for the upcoming RDNA 3 cards though.