Item #40436 (possibly named "Monster Polearm Harpoon Vrykul Blue Glow High") doesn't exist. It may have been removed from the game.
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Monster - Polearm, Harpoon (Vrykul) - Blue Glow, High - Live
Monster - Polearm, Harpoon (Vrykul) - Blue Glow, High - PTR
Monster - Polearm, Harpoon (Vrykul) - Blue Glow, High - PTR 2
Monster - Polearm, Harpoon (Vrykul) - Blue Glow, High - Beta
Monster - Polearm, Harpoon (Vrykul) - Blue Glow, High - Wrath of the Lich King
Monster - Polearm, Harpoon (Vrykul) - Blue Glow, High - Cataclysm