Finnacles...

Creative types could use a shark fin to strap on their backs every now and then, if only to keep the rest of the world at a distance, away from the bizarre and often precarious systems they use to navigate the seven seas. Yes, they would run the risk of getting a harpoon lodged in their side, but they would also experience the strange sensation of being feared at the primal level, which is good since artists typically opt for fearlessness instead.