Piscina

Piscina is an ocean planet very similar to pre-disaster Earth in biomes and surface lifeforms. In fact, while Earth was declining, many species were brought to live on Piscina's surface. It is the only planet within its star system.

The planet itself was named with Latin word for fish-pond due to its high diversity in sentient fish life.

Piscinans are the dominant lifeforms on Piscina. They build vast cities underwater, and smaller trading settlements on the surface because most other species are unable to reach the underwater settlements without spending extra money on water travel equipment.