Isn't the boss in Arm of the Father, Clay Claw meant to be Cray Claw? That would be a reference to the grey recolor of Karlabos in Final Fantasy 5, right?
http://finalfantasy.wikia.com/wiki/Cray_Claw It did feature the name Clay Claw until the GBA/mobile translations. I assumed that Cray Claw may refer to crayfish?