Ordinarily, octopodes have eight arms and legs. And should they lose one or more in an accident, they can grow the limbs back.
Which is what makes 'Henry' -- as staffers at Blackpool Sea Life Centre in northwest England have dubbed their find -- so unique.
His missing limbs stem from a birth defect.
"If you look closer between the legs, there's webbing that attaches each of the arms together," John Filmer of the Sea Life Centre told CNN Tuesday. "You'd assume if he'd lost one of his legs in an accident, there would be space for an arm to grow back.
"But there's no space for two extra legs to grow back. That's just how he is."