The largest undersea nation.
Habitable Zones - Coral Palace. Every town within the ocean's watchers has a coral palace at the very center - the pinnacle of Halinach's power. He has created an connected each to create a magical informational and transportation network. This has led to great many successes in finding and connecting many clans of Triton & Merfolk. Each coral palace also has large-scale enchantments to stabilize the turbulent waters that are a part of this grand expanse.
Inhabitable Zones - Migration Mayhem. Since the domain of Halinach spreads wide, it overlaps many older territories of the sea's most dangerous creatures. Krakens, Aboleth, Dragon and invasive species as well. It also contains the largest areas that the great coral currents run through wherein all undersea ocean currents convene and traverse the entire world. These currents also carry along them all manners of danger.
Battleground - Eldritch Temples. As the currents move and shift sediment and rock along the ocean floor, old temples are both revealed and buried as often as the tectonic plates. Many lost treasures and civilizations still lie beneath the ocean with not just Tritons know of them. Pirates, raiders, Sahuagin, all manner of creature fights for dominance and control over such ancient temples including their mysteries. Triton & Merfolk adventurers' main callings are the discovery and exploration of such ancient temples. Be it for glory, power, or money, these ancient structures draw in all manner of thrill seekers with promises of things beyond their wildest dreams.