'By The Sheen Of The Foam, I Beheld Two Skelingtons Sitting In Their Coffins'

Out on a walk by the beach at night, you look out into the sea and see... two skeletons surfing on their coffins.

We haven't done one in a while, but we're bringing back the concept art writing prompt. We provide the image, you provide the writing. A few days late for Halloween are these two skeletons, found in the British Library's flickr archives of public domain images. Here's the full thing, complete with caption with a truly amazing spelling of "skeleton":

Tell us this story.