This will take an expert ID

[Elegance Coral]

I'm honestly not sure of the ID, so I figured I'd see what everyone here thought.
Starting at 0:14 the video shows a diver swimming with a turtle.
Below them is a sea of tentacles.
What species do these tentacles belong to?
<iframe width="560" height="315" src="" frameborder="0" allowfullscreen></iframe>

 

[TheEngineer]

Look like a bunch of nems to me.

 

[dbraun15]

Torch?

 

[ritter6788]

Field of Sinularia? That's the only thing that comes to mind that would take up that much real estate and flow like that.