User blog comment:Ricizubi/Do you believe that the 10th memeber is Shirahoshi? or Jinbei?/@comment-24.62.161.225-20120702032413

Jinbe has no duty to protect the Kingdom or complete attachment to the kingdom because he is a pirate.

Spoilers......

After the battle of Gyoncorde Plaza, Jinbe offers to donate his blood to Luffy, saying that the law of Fishman Island which forbid fishman to donate blood to human doesn't affect him because he is a pirate.

onepiece.wikia.com/wiki/Jinbe