I just checked out spillcam again, and the most gorgeous long fish, an eel perhaps, swam into view. It appeared to be about the length of that pipe in the top third of the screen but was closer to the camera, so it would have been shorter in absolute length. Whatever the length of the pipe was.
It swam around the cloud of oil, inspecting it, inserted its front third into it with no apparent ill effects. It did make a quick motion, perhaps snorting some of the oil out of its mouth, and then swam off.
Oh man. Now I'd like to watch all day in case another undersea character shows up. I hope they're recording this.