Is there a re-encounter with the sea monster that ate Shanks's arm? Just of out curiosity, do we ever get to see the same sea monster that ate Shanks's arm way back in the beginning of One Piece?

I have only kept up with the series until Impel Down, so please no spoilers beyond a "yes/no they did/did not re-encounter the sea monster"
Yes, Luffy did. It isn't shown in the anime, but Luffy reencounters this Sea King, the Lord of the Coast, later in chapter one of the manga. Immediately after setting out from Foosha village Luffy is attacked by the Sea King, and is pleased to have a chance to show it what he has learned in the ten years since their last encounter.