The Thing Below (Ghost Rig 2: The Legend of the Sea Ghost) (2004)

A research team sent to investigate a distress signal sent from a top-secret oil rig makes a horrific discovery in this tale of maritime terror from genre specialist Jay Andrews. Upon arriving on the remote oil rig, Captain Jack Griffin (Billy Warlock) and Professor Anna Davis (Catherine Lough Haggquist) are perplexed to find no trace of life. As they venture ever deeper into the heart of the mysterious oil rig and crew members begin to disappear one by one, rumors of a mysterious creature said to lurk beneath the ocean floor appear to take on an element of reality. ~ Jason Buchanan, Rovi