Well guess what. We all see and Chemistry Is Like Cooking tshirt. I get what your saying but its absolutely not impossible to display a different behavior then recently thought. Maybe it had a disease. Most likely a relative of the ones we have in captivity. In order to pierce the shark’s skin and kill it, it’d need more predatory attributes instead of the tools it has to scavenge. You should also note that the legs, although similar in appearance, are shaped slightly different on the one in the video, which would help it latch onto prey better.