Part man, part dolphin or whale? He’s got a blow hole?
Yikes! What is Jason squirting out of that hole?
Best guess, this is probably a fistula. Per Medical Dictionary.
A Fistula is a permanent abnormal passageway between two organs in the body or between an organ and the exterior of the body.
Organs involved? Intestine? Pancreas? Is that why he has to wear a bandage over the hole? Or is it because he gets inconvenient oodles with sounds?
Now if he shows us a flipper, then perhaps he may be part dolphin or whale.