The MODIS sensor satellite imagery is showing a beautiful and evolving large plankton bloom in the Chukchi Sea at the moment.
The plankton are the lighter green bands I've labelled and the full image is available at an astonishing 250m resolution.
If the Bering Straight looks odd it's because this image is taken from over the North Pole and looking southwards.
Conventional wisdom says that as the Arctic Ocean sea ice retreats over the coming decades and the ocean warms, then we are going to see more plankton blooms like the one shown above.
But that's not the whole story. Professor Kevin Arrigo published a paper in 2014 that suggested the plankton blooms in this part of the Arctic can form under the ice.
The dark areas are ponds of water where the snow has been melted away. The bare ice beneath can let light through. Arrigo and his co-workers suggested that this is enough for biological production.
It was also the subject of a post I wrote a couple of years ago.
Jonathan Amos reported on a piece of work last year that showed the extent of the melt ponds can also predict the summer extent of Arctic Sea ice.