This quest is not available in game.
Bring a scale of Old Murk-Eye to Captain Grayson at the Westfall Lighthouse.
When my life was ended upon the rocks, I had no clue what the afterlife held for me. The Lighthouse was black that night because Old Murk-Eye had scared the keeper's family off. They returned and re-lit the flame but Old Murk-Eye coerced the weaker minded murlocs to raid the Lighthouse with him once again. The second time the family was not so lucky and before my eyes they perished helplessly.
Slay Old Murk-Eye if you see him along the shore and bring me one of his scales and I shall reward you.