Alisaei's Stones dialog gives wrong kill request amount

NPC name: Hirase
Area and coordinates: The Ruby Sea x22.1 y9.4
Steps:
1. Start quest "Alisaei's Stones"
2. Hirase: We've got to cull the thieving bastards regularly─so happens I sent three of my mates out there before you came along. Still, the more the merrier. If you can kill four or so, that ought to be enough.
3. Look at Quest log, it says to kill 2 "Use the rotting fish to lure out aggressive sharks and slay them. 0/2"

At the very least, I can take some comfort in the knowledge that it used to be four sharks once upon a time. But yes, although the quest spec was revised, the text was not until recently. It'll be addressed in a future update. Sorry about the confusion!