So backstory - I have a friend who gets crafted sea creatures from me every birthday. Not because she like sea creatures particularly, but because I kind of love squids and octopi. Previous presents have been a squid hat, crochet octopus, plushie octopus etc. So i decided this would be a cephalopod free year.
Found this amazing fiddler crab pattern on deliciouscrochet.com and, being Jewish and a massive fan of musicals, decided the only place a fiddler crab could possibly live is on a roof. And so it was.
Note - said friend has no love for musicals and isn't Jewish, so the joke took a little while to land.