they are there for 195 gold bounty quests and they are in the barbossa's clothing quest line (I think the quest line is called Adoria's family or something) and there is a black pearl quest to dig up the key to davy jone's heart for Andrew Bowdash.(of course the area there is surrounded by mobs lol.) and it ranges from lvl 22-40 (NOTE: The lv 40's in my opinion are easy kill becasue they are grenader's making them only sometimes hurt you and they hurt themselves, they only randomly throw seige charges which hit a lvl 38 for about 180 I believe.)
The hardest mobs there are molusks (around lvl 38) and seabeards (around lvl 36)
NOTE:seabeards have brawl and bladestorm which can dish out a good 500 on a player.
hope his helped