Check out this creature from the deep at Pink Tentacle. Although, technically, it is a lot of creatures working together in specialized functions to make a complete organism capable of surviving. If you imagine it in space instead of the ocean depths, it’s not hard to see it as an alien. Heck, even in the ocean it’s not hard to see it as an alien. It is definitely alien to me.
Also, I’m curious as to who videoed it. Was it an umanned sub, or did someone actually go down to 770m (2526 ft) below the surface to look around. I would volunteer for that job! (I’m a scuba diver and I love deep dives – of course in scuba gear the pressure at that depth would crush a person instantly, but I could go in a sub.)