Hey, back with my 4th pacifist, leveling with gathering this time...
Anyway, I was wondering what counts as catching Abyssal Clams, since they are looted, and don't appear to be soulbound. This could mean that they can be bought on the AH. Maybe the achievement detects looting the clam itself for credit.
For that matter, the other non-low-level fishing for the Oceanographer, Isle of Quel'Danas, was (last I heard) warlock-summonable for lowbies (back when herbalism had heals and before gathering added level requirements, there was one mana thistle that was far enough away from mobs for twinks to use to level herbalism).
If both of these are true, a low level could get Oceanographer.
Anyone want to get level 5, turn off XP, and go for it?