if jack represents land with his devil fruit and king represents air through his devil fruit, what if arlong represents the sea? I mean we ddidnt saw the guy from impel down so theres a chance that someone help him up or he somehow escaped after he was defeated by luffy, i think that stomp that luffy did wasnt enough to kill him. If he was alive this is the best time to get a closure from jimbei and nami also. What do you guys think?