The Gigascorpis is the main antagonist of the 2010 giant monster film Amphibious.
Its vocal effects were provided by Simon Gershon.
Marine biologist Skyler Shane meets Jack Bowman, at a northern Sumatran lake to search for prehistoric samples of a Devonian period giant sea scorpion called Gigascorpis. Then, Shane meets Tamal, a child. At night, Tamal's uncle is killed while walking on the shore. Andi, Jack's childhood friend is killed too. All of them died of a big bite and sting.
Boss Harris, a boss in a corporation is dragged when boating in the sea, and finally when sailing, Jack and Shane's boat is attacked by a giant sea scorpion: a real-life Gigascorpis. They manage to escape but the monster managed to kill crewmen Big Rudi and Rizal. Tamal says that maybe they should dive to subdue the creature. Aris, a young diver helps them. They are still confused why would a long extinct creature is now here.
Jimmy Kudrow, a young president of a corporation revealed that he breeded prehistoric creatures, and Gigascorpis was the most perfect creation. But during this breeding session, the Gigascorpis infiltrated his base and killed him, then ate him. The Gigascorpis is pursued to the sea, until Shane takes a harpoon along with him and dives.
The battle ensues and Shane tries to avoid the Gigascorpis' sting attack. Finally, Shane shoots the sharp harpoon into the Gigascorpis' head, and red blood gases come out. Finally the Gigascorpis was dead and the threat has ended. However in the rubble of Jimmy's base, a gigantic black stinger comes out signifying another Gigascorpis.