User blog comment:JapaneseOPfan/Arlong problem/@comment-1949750-20110207220310

Let's see. I say Arlong picked the East Blue because since it's the weakest sea of the all the blues, it would be easy to conquer.

As for why his bounty is so low compared to Fake Luffy's is because Remember, he bribed Nezumi (some high-ranked marine officer) to keep his activities quiet. if his activities were actually reported, his bounty would been much higher. It's kinda how Crocodile's bounty would have been 160000 if he wasn't caught by the Marines and made Shichibikai.