Another interesting link: perhaps this creature is now dead because of the format of the discovery

https://www.reddit.com/r/askscience/comments/2n1yd4/how_is_i...

> I'm a marine biologist and one of my former professors actually did all his research on deep sea eyes, mainly in invertebrates. I asked him about it once, about whether or not it was harmful to have the submersibles blasting white light around everywhere, and his answer was "yep, most of those animals are now blind and will likely die." Research subs usually use red light when in the deep sea since 99.8% of animals can't see it (red is the first wavelength filtered out in seawater so there is no red light at depth. Almost all deep sea organisms don't even have photoreceptors to see it) and it's not harmful. The white lights are mostly used for filming purposes. But yeah, they absolutely are being blinded most of the time.

If you feel better, this fishes can probably survive even being blind. Sharks have complex and sophisticated senses related with smell, touch and taste, and can also sense electric fields emited by preys (or machines)

So, that could be the reason for the way this animal behaves (in my amateur opinion a bit aimless), too?

Looks more curious than afraid. Investigating the camera probably. If feeling pain would swim away.

A healthy fish also; not parasites at sight.

Per National Geographic: "The video is the first time the pointy-nosed blue chimaera [Hydrolagus trolli species] has been seen alive in its natural habitat." [0]

[0] http://news.nationalgeographic.com/2016/12/pointy-nosed-blue...

> this is not actually the first time a ghost shark was caught on camera

Nope, they have been filmed before

https://www.youtube.com/watch?v=itDgL7nq8Kc

https://www.youtube.com/watch?v=SxuAh8hXnS4

Is just that is a rare species of Chimaeridae