The large-eyed shark was discovered dead in the water off the coast of Australia.
It had a canine-like pointed nose, a protruding white mouth, and protruding white teeth.
Sydney trapper Trapman Bermagui was perplexed by his improbable catch from 2,133 feet below the surface.
Online discussion about the social media post's look and attempts to identify it were sparked by the image.
A photo of the predator's head that was posted to Facebook.
On Monday has received over 1,000 likes and about 250 comments.