(This will be a rather short passage)
The Triton Kingdoms, whenever referenced, are usually referring to the three large seas that are contained near the center of the continent. Three long, yet narrow seas are connected to each other and the ocean through countless deep rivers that have been excavated to house buildings, as well as be able to allow passage of larger trading vessels and pack animals to the kingdoms.
The kingdoms are ruled and populated by Triton, a form of merfolk that have extensive trade networks and rule the inner seas. Having their own unique problems for being a water-based society, they have a complex culture different from land-folk but have been famously known to be excellent traders and have many rules of hospitality for traders as, even during war, traders won’t be attacked.
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The three seas that the Triton inhabit are split between two kingdoms, and a third sea between the two kingdoms contains several small city-states and trading cities. The two kingdoms, Selebrom and Kir, have a rather on and off relationship, being both trading partners and also enemies at war. Although they fight wars with each other, most fights end up being skirmishes as the real fighting are between the trade each kingdom can get, and Triton are fierce merchants and traders.
While farther away from the seas the less likely it is to meet a Triton trader, the rivers directly connected are almost entirely controlled by Triton, and huge trading ships and pack animals like manatees can be seen moving all the time, sending cargo around as fast as possible. These rivers are also extremely safe, as bandits that try to attack find themselves more so than not obliterated before being able to deal any damage.