Nautil

Nautil, also known as the hydro Isopup homeworld is the oldest known homeworld in THE galaxy.

It is theorized that all Isopups originated from it due to numerous “cave paintings” depicting the planet splitting apart and Isopups being separated out to other planets. What remained of Nautil after the “great split” was mostly water and thus hydro Isopups evolved and flourished along with six other species of sentient life. These Isopups constructed great cities above and below the water with some even hanging from the underside of great cliffs and chasms.