Dylan Weir speculated that this Anomaly had been recurring at the bay for centuries, and that a Titanoboa had been passing through it between the Holocene and the Paleocene whenever the Anomaly was open.
The Anomaly was open in early 2012, and the Titanoboa came through into the bay. Mac Rendell tried to lure the Titanoboa back through the Anomaly, but the Anomaly closed before the creature could return through. It then briefly reopened moments later, and Mac was able to lure the Titanoboa back through the Anomaly. The Anomaly then closed seconds later.