How to collect plankton by -35°C? The technique was quite effective yesterday: make a hole and fill a large container with sea water using a pump. Bring the container inside, and before filtering, wait a bit as the water warms by just 1°C. Then the filter does not clog with ice.
On the menu: zooplankton (Copepoda) and phytoplankton (Dinoflagellate Ceratium - bottom right - and Diatom Chaetoceros - bottom left). Thank you Pierre Mollo for the identification!