Watch Roboshark for Free: How to Stream the Movie Online at 123Movies. . What starts off as a typical day on the streets of Seattle soon becomes a terrifying bloodbath, when a great white shark devours an alien space probe…and ROBOSHARK is born. The U.S. military comes after it with guns blazing, but it’s the power of social media that puts an ambitious newscaster and her tech-savvy daughter ahead of everyone else in the race to stop the destruction.