Mer have a long tail covered in scales, their colorations varied and vibrant: different coloring, stripes or specks or solids, their tails long-finned or short or wispy. They have gills beneath his ears, that allow them to breathe underwater and claw-tipped, webbed hands, which are helping them to swim.
Powers & Abilities
The Mer are able to shift into fully human bodies for short periods of time, but if they go for too long, the shift will be permanent, their scales drying up and flaking away into dust, their gills shrinking to nothing. They have to swim at least once a day - even though a big tub filled with water will suffice.
Their magic mostly involves the element in which they live, though some can summon tempests. The River Queen, part mer, part river-spirit, is rumoured to summon far worse.