Description: The Halloween Hexadecapus will arrive on October 29th in the Graveyard. Wranglers can catch the limited-edition fish with a fully-leveled shipwreck spear gun. Notes:How to catch: The Halloween Hexadecapus will arrive on October 29th in the Graveyard. Wranglers can catch the limited-edition fish with a fully-leveled shipwreck spear gun. The Halloween Hexadecapus Fish can still be caught, but only by harnessing the power of Liquid Gold on it at the island of WaterPort. To see the full Halloween Hexadecapus Fish image, click here.