The scientists from the country's Institute for the Sea and Atmosphere believes the shark to be the "living fossil" of the dinosaurs era as its remains date back to 80 million years- the Cretaceous Period when the Tyrannosaurus Rex and Triceratops walked on earth.
After noticing the creature's unusual appearance, the commercial fishermen handed it over to a research team from the Institute for the Sea and Atmospheres, who were working on a project to decrease unwanted catches in commercial fishing.
"The research was originally meant to minimize unwanted catches in commercial fishing", the researchers told SIC Noticisas TV. Scientists only know that these are one of the creepiest creatures existing beneath the ocean surface.
In fact, it's so rarely seen, despite being around long before humans, that it wasn't even discovered before the 19th century.
As per reports, the Institute said that the fish measured 1.5 metes in length was caught from the waters off the resort of Portimao at a depth of 700 meters.
The scientists named the Shark "Chlamydoselachus anguineus". The largest the frilled shark can grow is up to six feet long that is the size of a tall man. The gills of the shark has frilly, fluffy edges, but the cuddly factor ends abruptly there.
Professor Margarida Castro of the University of the Algarve reportedly said that the shark gets its name from the frilled arrangement of its 300 teeth, "which allows it to trap squid, fish and other sharks in sudden lunges".
It's lined with spines called dermal denticles, which, combined with the teeth, give the mouth an all around frightening look. But if you do, it's safe to say: Keep as far away as you can, and whatever you do, try to avoid its ferociously awesome jaw.