[ Beastlands ] [ Krigala | Brux | Karasuthra | Threefold Ocean ]
The Threefold Ocean
Beastlands — Layer the First, Second and Third
There is a single ocean on the Beastlands, that connects the three layers—but not in the way a prime would expect. The surface of the ocean is found on Krigala, where the sun smiles on the surf and flying fish play in the reefs. As you dive deeper into the sea, the light becomes dappled and the shadows play tricks on your eyes. When you reach these crepuscular depths, you have crossed over into Brux, and it is here the ocean fish dwell, the whales and the octopus. Plunging deeper still, to the very bottom of the ocean abyss, the light is completely extinguished. This part of the ocean is in Karasuthra, and down here in the gloom lurk strange and sinister creatures. Unexplored tunnels in the ocean trenches lead into deep grotto caves, carved through the bedrock by unseen hands and fast flowing waters. Here are the deep caves, where creatures who have no need for eyes dwell.

Locations of the Threefold Ocean
- Hadeopelagia (realm of the anglerfish lord) ‡
- Hypogean Caverns (realm of the deep caves) ‡
- Moanaura (sunlit ocean shores) ‡
- Octopodes’ Grasp (realm of the octopus lord) ‡
- Ta’aroa (realm of the ocean) ‡
- Tiger Shark’s Dreaming (realm of the shark lord) ‡
- Whalegrounds (sunlit ocean shallows) ‡
Powers of the Threefold Ocean
- Mami Wata (African power of snakes and water) ‡
- Sedna (Inuit power of sea creatures and the dead) ‡
- Tangaroa (Māori power of seas, rivers and fish) ‡
- Yemaya (Yoruba power of the oceans and motherhood) ‡
Animal Lords of the Threefold Ocean
- Anglerfish Lord ‡
- Fish King ‡
- Octopus Lord ‡
- Shark Lord ‡
- Whale Lord ‡
More details to follow!
Source: Jon Winter-Holt. Canonwatch: The Threefold Ocean is homebrew. Thanks LobotomyDoc for sparking the idea!

Wow you did this quickly. Honestly the planes need more oceans (except maybe the Abyss it has enough oceans). Oh maybe you could do the Oceanus sea vents that were on the River Oceanus. With the sea angels. Food for thought.
Oh one more thing is the river that runs in Brux the same water that runs in the Octopus Lord realm. Does octopi swim through the rivers of Brux?