[Shadykaricta]

I definitely feel Jimbei would feel ashamed of Arlong. Well not of Arlong but of what Arlong became because he created Arlong in a since. Hell Arlong might have become the way he was because Jimbei left and became a shichibukai and if that's the case Jimbei might have been planning to take care of Arlong himself. Since luffy beat him to the punch though I could see Jimbei needing to fight luffy because of his "code." Especially if Jimbei believed he could have "saved" Arlong from his ways but his defeat at Luffy's hand lead to Arlongs death and disgrace.