Photos of a creature — resembling a “mermaid alien” — washed ashore on an Australian beach have sent the internet into a collective tizzy online as viewers scramble to guess the mystery critter’s identity.

The macabre-looking flotsam first came to light via a post in the Marine Biology Facebook group that’s currently making waves online.

“It was exactly like a mermaid shape,” said uploader Bobbi-lee Oates, 34, of the skeletal remains, which she stumbled across while walking along the beach in Keppel Sands, Queensland.

“We were driving along the beach looking for a campsite, and we couldn’t help but notice how much the skull looked to be in the shape of a human’s,” the Aussie recalled. “So we instantly stopped from the confusion as to what the hell could this be, and why does this look like a human skull?”

Accompanying photos show the apparent oceanic enigma, which indeed boasts a dome-shaped humanoid skull, and splayed out ribs that evoke the alien’s locks in “Predator.”

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