Disaster in the Underwake
“These aquatic outsiders resemble merfolk, except where a merman has a single fish tail, a triton has two scaly, finned legs. They are the watchers of the sea, often using dolphins or other aquatic creatures as mounts, and maintaining a vigil against the evil races below the waves. Originally hailing from the Plane of Water, long ago the triton race migrated to the oceans of the Material Plane, and they are now fully adapted to life there. Their split legs allow them to hobble about slowly on land, but they rarely do so, preferring their natural environment and the greater mobility their forms afford there.
Tritons make their homes on the sea floor, growing coral reefs and sculpting stones into gentle arcs to create living spaces that are beautiful and natural-looking. Many of these sites lie near great thermal vents, providing not only heat but also rich minerals and nutrients for the fish and other creatures tritons eat. Tritons can breathe air or water, but prefer water. While their cities are designed for water-breathers, they usually feature one or two airtight buildings set aside to hold air for landwalking visitors. Triton settlements can be found anywhere from arctic to tropical waters, but most are in temperate locations. They generally avoid the deepest reaches of the ocean, for it is here that creatures like aboleths and krakens rule—creatures that the tritons have long waged war against.
Tritons maintain relationships with other good undersea creatures, but mostly keep to themselves. They aid others in fights against their enemies (primarily krakens and aboleths, but also lesser evils like sahuagin or skum). They typically form strong squadrons of aquatic cavalry trained in coordinated attacks when they go to war. Tritons tend to distrust outsiders, and usually avoid land-dwellers. They sometimes provide aid to air-breathers, even though they often see them as trespassers under the sea; when they do help landwalkers, their price for this is high. Nevertheless, when they witness a landwalker do battle against and vanquish a great evil such as an aboleth, they are quick to cast aside their prejudices and accept the great hero into their societies with open and welcoming."