I don't have time to look in my file right now, I only have a moment, but I've seen double crabs in at least one Arabic manuscript (Kitab al Bulhan, 14c, two big gray ones) and in others where each constellation is mirrored so show both skyviews (al-Rahman al-Sufi).
It's the double crayfish that is unusual.
It's the double crayfish that is unusual.