Isle de Watera

The Isle de Watera is a truly immense spherical shell of salt, fresh, and brackish water.   While most of the plane consists of liquid water, intrusions from neighboring planes provide solid ground within the oceans. These include masses of rock fallen away from the Plane of Earth, masses of ice from the Plane of Air, and the ruins of lost cities from other worlds. In some places, spires of solidified magma project through the Plane of Water entirely and into that of Air. These areas of solid ground are often home to the plane's settlements.   The Isle often storms and sink into the waters to form enormous whirlpools and waterspouts. The water becomes tinged with sediments and thermal vents shoot jets of mineral-rich water and superheated brine into the oceans of the plane.

For obvious reasons, this isle is inhabited almost exclusively by aquatic and other water-breathing creatures. The race of genies known as marids control a vast empire, in nearly-constant warfare with the native Sahuagin. In the darker depths, cyclopean kraken and brine drakes make up its less innocuous denizens. Beyond these larger populations, small settlements of water mephits, tritons, merfolk, and a staggering variety of more mundane aquatic life makes its home here.  

Marid

  The empire of the water genies known as the marid once ruled the Plane of Water, but collapsed after the destruction of its capital city, however when a rift opened and took this pocket of the plane itself, it gave them a sense of purpose to grow a new home however the marids have remained divided since, and in the modern day live in disparate nations with only sporadic contact with one another, spread out from a divide of the planes.  

Sahuagin

  The Sahuagin of the Plane of Water are actually not natives, having traveled there from the oceans of Caelum eons ago. Upon arrival they made war on the fractured marid civilization, attempting to gain an empire for themselves. Once they achieved their objective, however, they fell into infighting and eventual civil war. Now the sahuagin inhabit the darker reaches of the plane, grouped into small kingdoms controlled by tyrants or mutant warlords who long to re-establish their lost empire.   The sahuagin claim to have come to the plane following a prophecy, but scholars theorize their arrival to be due to a kraken scheme or a terrible mistake on the part of the marids.

Kraken

  Despite their intelligence and power, the krakens are not prone to organizing their efforts. This has allowed the brine dragons to expel them from the depths as their own power and holdings grew, forcing the krakens into the lighter waters of the plane. This has forced many krakens to enter in begrudging alliances with other races, often installing themselves as advisors to marid and sahuagin rulers. While the krakens find such alliances demeaning, they hope to forge the disparate genie and sahuagin nations into stable empires once again, specifically ones heavily reliant on kraken support.  

Brine dragons

  The brine dragons rule large stretches of the Isle's darker depths, the extent of each realm and the size and power of its dragon ruler increasing as one descends, however this can be seen as an issue due to how the pocket has formed.    While solitary and reclusive, the dragons form a collective realm led by interconnected councils, The brine dragons' relationships with other races are often adversarial; the dragons seek to bind all visitors into their realms to their service, and are locked in conflict with the krakens who also inhabit the depths. The constant internal and external conflicts of their realms have driven a divide in which the brine dragon that exists is the solitary one.  

Others

  The Plane of Water is home to numerous species beyond the dominant ones, both native and immigrant. Merfolk are immigrants to the plane, having settled here at an unknown date, and live in carefully hidden settlements throughout its expanse. Undines, likewise descended from immigrants to the plane, live in communities throughout the Plane of Water. Although they are scattered and often found living among the other races, rumors claim that they are planning to unite to form a major power of their own.   Other species, including locathahs, merrows, ceratioidi, ocean giants, murajau, tojanidas, and suli, are also present in the waters of the plane.   In addition to civilized societies, the Isle is home to marine creatures of immense size. One such creature is the Lion's Mouth, a sapient jellyfish-like creature composed of billions of aware and perceptive organs, which lives within a kelp forest stretching to an unknown location where the jellyfish's bell floats. Lure is an anglerfish thirty-five miles long that feeds by filter-feeding entire towns and pods of whales. A town, the ceratioidi trading port of City-on-Lure, exists on the creature's back. Other beasts of similar size include the Chiming River Dragon and the Void Mosasaur.