Shellycoat
Region of origin: Southern Scotland
A freshwater boggart that haunts rivers around southern Scotland and Northern England, Shellycoat is so named, quite literally, for the coat covered in shells he wears which creates a telltale rattling sound as he moves. Not malevolent but mischievous, he will attempt to pull mostly-harmless pranks on people who venture into his territory in an effort to cause them to lose their way or just mess with them for his own amusement; he would often pretend to be someone drowning to trick would-be rescuers to jump into the river, then laughing at their getting drenched for their efforts.
Originally posted on Tumblr on August 26, 2016
The Compendium of Arcane Beasts and Critters 