Surf-on-the-Shore-Brings-Sand-to-the-Depths is a sea-pony. This, in itself, would not be strange, if any other sea-ponies had been seen in Equestria for the past 500 years.
Why, then, has he washed ashore now, covered in what look like hundreds of shark bites?
Written for the February Writing Contest of the World-Building Alliance - although, frankly, I'm not sure I've done enough world-building to even qualify. It started out as a more comedic endeavor, referencing the Gen. 1 song "Call Upon the Seaponies" from "Rescue at Midnight Castle" at every available opportunity, but it evolved into a romance after I listened to this song about ten-dozen times.
It is what it is. Inspiration struck, and I hammered it out. C'est la vie.