Angular roughshark: The pig-faced shark that grunts when captured

Name: Angular roughshark (Oxynotus centrina)

Where it lives: In the eastern Atlantic ocean from Norway to South Africa, and the Mediterranean sea

What it eats: Fish, crustaceans, molluscs, marine worms and shark eggs

Why it's awesome: When we think of sharks, we tend to imagine large, muscular predators like great whites or hammerheads. But for the pig-like angular roughshark, this is not the case. These bizarre sharks have flat heads, wide-set eyes and pink snouts.

"It is commonly called a 'pig fish' because when it comes out of the water it emits a kind of grunt," Yuri Tiberto of the Elba Aquarium in Italy, told Toscana Media News in 2021, after a dead individual was pulled from the water in Elba, an Italian island near Tuscany, and posted to Facebook by the tourism website Isola d'Elba App.

Angular roughsharks generally grow around 3.3 feet (1 meters) long and have thick, gray-brown bodies with two large dorsal fins that resemble sails. They have a triangular profile from the front.

Like all sharks, their skin is covered in dermal denticles — flat, V-shaped tooth-like structures that consist of pulp, dentine and enamel.