We don't really do down a good ways, Krishna. We go about 100 ft or so. This creature lives 2000-3000 feet down. Do you even understand the pressure at those depths? Furthermore, the moment that I heard the news story about a deep sea creature surfacing, the thought in my head was "oh, it must have been dying" even before ALL those scientists supposed the same thing. Why did I think that? Because of past reading that I have done about marine biology and specifically about animals such as giant squid, and the like, that we rarely see. We usually only see these things dead because the only reason they surface is because they are dying. I think several years back, they saw a deep sea giant squid alive, but like this shark, it died shortly thereafter. It was already sick.
So, I'm basing my opinion based upon what I have read about fish/animals that I have read about that live at similar depths.
Once again, I think you are nice for caring so much for the creature, but I just believe she was sick and dying. They said she was in terrible shape when they saw her. Did you see her gills? I will admit that I haven't seen a frilled shark before that one, but those gills looked bloody to me (not a good sign). I don't know if she always moved like that, either. Didn't look like a very effective locomotion. Not sure if that is how they always move or was just because she was sick.