A sea-rious warning.

Two massive “doomsday fish” washed ashore on a Mexican beach – leaving tourists stunned in a rare sight that some believe signals an ominous warning for humanity, according to wild footage.

The 30-foot-long Oarfish – which lives at depths of up to 3,200 feet – surfaced along the shore of Cabo San Lucas in Baja last month, sending one young beachgoer scrambling to push one of the slithery creatures back into the water as others looked on from a safe distance, an Instagram video showed.

The 30-foot-long Oarfish surfaced along the shore of Cabo San Lucas in Baja in an unusual occurrence. Instagram/monicaandco_

“We saw something in the distance, it was flashing, and it was really bright,” Monica Pittenger, who captured the chaos, said in a video collaboration with social media account We Love Animals.

“And when we saw them up close, it was like nothing we’ve seen before, so we were like, this can’t be real. My sister just cannot stand anything in pain. She reacted super fast.”

The clip showed the elusive, ribbon-like fish flopping on the sand as Pittenger’s sister bravely helped push the ocean dweller back into the water.

The the elusive fish was flopping on the sand as beachgoers helped push the ocean dweller back into the water. Instagram/monicaandco_

One female onlooker urged the men watching to jump in and help, as the gallant woman eventually got assistance from about five other people.

The other Oarfish – the longest of any bony fish that can grow up to 56 feet – was slightly further upshore.

“She ended up getting it pushed back in and both of them ended up swimming off,” Pittenger recalled.

Beachgoers in Cabo were stunned to spot two deep-sea oarfish near the shore, a rare glimpse of the mysterious “doomsday fish” that are hardly seen at the surface. pic.twitter.com/jxdzD2tx5U

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“I think a lot of people were very hesitant because nobody really knew what it was, it’s not everyday you see that. I didn’t believe my eyes. It was like something out of a fiction movie. When we realized how rare it was, it was a pretty cool experience. Very surreal.”

While spotting two Oarfish is considered “one in a billion,” legends claim that even seeing one is a sign that impending disasters, such as earthquakes or tsunamis, are imminent, according to the Ocean Conservancy.

The other Oarfish – the longest of any bony fish that can grow up to 56 feet – was slightly further upshore. Instagram/monicaandco_

While scientists have dismissed any link between Oarfish sightings and natural disasters, Japanese mythology also suggests the serpentine plankton-eaters will strand themselves when trouble is near.

Doomsday fears surged during the 2011 Fukushima earthquake and tsunami, when dozens of the deep-sea creatures washed ashore in the two years leading up to the catastrophe. 

Despite the apocalyptic myths, Pittinger said the rare discovery was “extremely magical.”