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| Plume descending as a tube of ice forms around it. |
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| 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..
