Maybe "joy" is overstating it, since having your front limbs mauled by sharks is a tough thing to get over. But thanks to the perseverance of a group of researchers at the University of Tokyo, loggerhead sea turtle Yu Chan can swim again after a shark attack. 27 prosthesis models later (see? Perseverance), she's back in her tank at the Suma Aqualife Park in Kobe, Japan.
So everyone stop being such a miserable jerk and live by Yu Chan's example. By which I mean, in a shell with weird barnacles on it.
'Q&A: How a Turtle With Fake Limbs Got a Leg Up' [Newswatch/NatGeo]