I relish watching the NOAA’S Okeanos Explorer ship’s live-streaming videos. It’s an under-the-sea safari without the nausea. One cool customer is the sea cucumber. It breathes through its toothed butt and eviscerates itself as a defense mechanism, so cool. And they come in so many shapes and colours.
The Wikipedia entry on it mentions that it is described in Edgar Allen Poe’s only novel, The Narrative of Arthur Gordon Pym of Nantucket (1838), which you can listen to here. The narrator refers to it as bouche de mer, as in amuse-bouche for eating; bûche would be log; bêche-de-mer could be spade: they could all work: such a versatile creature.
Of course, it could also be a shirt, a sticker, a scarf, or so much more.