Given the irregular distance between holes and the different angles of the holes, I'd guess something organic. There's still a lot we don't know about even well known fish like sharks, what to talk of fish or marine life that we have yet to discover. Seeing the raised ridge along the entire set of holes makes me wonder if they're from some kind of eggs that hatched after being embedded in the seabed.
It's amazing that there are still so many mysteries like this on Earth.
> Given the irregular distance between holes and the different angles of the holes,
They say the exact opposite in the video: "One of the things we're interested in is how almost perfectly aligned these are and the regularity of the spacing of the holes and the size of the holes themselves. And the shape of the holes, the angularity, the rectangularness."
They are pretty regular, but not perfectly so; and in the vid they are sorta straight but do curve a bit. Biological regularity it less rigid than physical regularity.
It's amazing that there are still so many mysteries like this on Earth.