RO-20
An ocean world where life is green, lives in the sea, and runs on sunlight. Its cells carry a folded nucleus, a four-layer membrane, and one organelle that does the work of both mitochondria and chloroplasts. Everything that follows grows from that start.
The plates name places too: the Folegrass land, the Arched Barren, Valentine's Bay, and the Circularis current that feeds them. Some carry map squares (V1-B6, B7, C6) from a map not yet shared.