Pointy nosed blue chimaera, Hydrolagus cf. trolli
I really enjoyed the narration in the video from the Monterrey Bay Aquarium Research Institute, (Monterey Bay Aquarium Research Institute (MBARI)). It discusses the difficulty of identifying deep sea species.
h/t Cindy Brown
http://www.mbari.org/the-pointy-nosed-blue-chimaera-really-gets-around/