Comment by thatandthis on Shiro Kami

@thatandthis The Sea King or Sea Beast (since it was small and weak) in the East Blue which ate Shank's arm. 

I think he means Shank's may have had a contract on him with Emu, but sacrificed his arm to the beast to remove that contract... Kinda out there but not that crazy...

Still if that was really the case... Pretty sure Shanks could have found a different way to remove it or at the very least removed it long before meeting Luffy?