Just a regular old seal ... whose head happens to be inflatable.
Ok, so technically, it's not actually the hooded seal's head that blows up. It's actually some loose skin on its forehead, which makes a lot more sense given its name.
When the hooded seal gets angry, the membrane inflates. This is common when two males compete for the same female, as was demonstrated in this 2012 video posted on YouTube by National Geographic.
You can literally watch a hooded seal's temper flaring.
After the "fight", the seals deflate and return to being gentle giants ...
Unfortunately, the hooded seal is at great risk. The estimated world population of the hooded seal is only around 650,000, and they are listed as "vulnerable" by the International Union for Conservation of Nature (IUCN).
Usually found in the northern Atlantic, the population of the hooded seal is dropping.
The ICUN found that while northwest Atlantic populations were essentially stable, "the northeast Atlantic stock has declined by 85 to 90 percent over the last 40 to 60 years."
Russia and Norway both allow hooded seal hunts in the spring. According to Fisheries and Oceans Canada, which regulates Canada's annual seal hunt, 8,200 hooded seals are set to be killed this year alone.
Even more seals die every year by becoming ensnared in fishing nets.
Too bad we can't solve all our problems by puffing our heads out!
Check out this unique behavior in the video below.