Most science fiction movies are based loosely on science. Usually, this means they make a few technical or impossible leaps to move the plot forward but generally adhere to the basic laws of science. But in most cases, filmmakers are forgiven for their science-defying sins as long as the story makes up for it. In contrast, Endless Descent (aka The Rift) seems to delight in making so many impossible and incredulous scientific leaps, that they grow to a level of absurdity that transcends the believable.
There is a legend, spawned deep in the mysterious kelp forests of southern California, of the killer abalone. On extremely rare occasions, conditions align with a violation of the abalone code that triggers the rare spawn of the trio of terror in the abalone universe: the red, the black, and their offspring, the pink abalone. So it was during the El Niño of the early 1980s that such an event occurred, much to the detriment of all those involved and future world peace.