Info about marronians in general as well as a depiction of a standard inland Marronian can be found https://www.furaffinity.net/view/60838026/

This is a coastal Marronian! This is a hornless variety of Marronian that lives by the ocean, more removed from all the volcanic smoke and ash, they suck blood and turn it into toxins just like inlanders, but they don't have sharp stinger tips like they do, instead it secretes through the fine hairlike fins on their tail when they are threatened.
They also are generally less speciest and untrusting like a lot of Marronians farther inland are.