Bizarre arctic brine plume forms a death-dealing tube of ice to the sea floor.
Plume descending as a tube of ice forms around it.
And having hit the ocean floor, it drifts along killing starfish.
A BBC team found a new phenomenon while filming a dense brine plume under the arctic ice. It had been left behind when relatively salt-free surface ice formed. As the plume sank carrying bitter cold from the surface, the deeper water around it was transformed into a shroud of ice through which it passed. When it hit the ocean floor, it left a traveling path of ice entombing hundreds of starfish. The video at the link is time lapse photography since a foot a minute would be lickety-split for a starfish..