My good pal @socknessmonster and I have been tossing around ideas for a li'l story we’re gonna write
And yes we have actual characters that I’ll probably share but i have a bad habit of worldbuilding monsters-first so here are the kelpies that patrol the beach and inland waterways of the setting. Though superficially similar to horses they share a closer lineage to the hippopotamus with an attitude to match. They usually mind their own business, but are fiercely territorial and will attack (and often eat) small annoying animals such as children that try to ride them. This has earned them a reputation as maneaters, and they were promptly hunted to near extinction. Small coastal populations still exist because local communities believe they keep away mermaids, which despite being rarer even than kelpies, they inexplicably seem to be perfectly adapted to lure wayward sailors close with their eeirily humanlike “faces” and reported habit of strategically stalking and even “playing” with their prey to draw them to the water’s edge.