Sea Beast, also known as Troglodyte, is a 2008 American television monster movie starring Miriam McDonald, Daniel Wisler, Brandon Jay McLaren and Corin Nemec. It was released to DVD on June 30, 2009. It is the 16th film of the Maneater Series.
Will is fishing with his crew in a thunderstorm. As they try to pull the fishing net in, a wave hits the ship and one crew member, Joey, is suddenly spat in the face, attacked, dragged into the sea, and killed by an invisible creature. The mysterious creature attaches itself to the bottom of the boat.