Whales feed on plankton like many living things in the sea. Whales use their fins like a filter. Planting sea water through the noses and eats plankton. Since plankton decreases in the north sea every November, whales are forced to spend more energy from the energy they spend while looking for food while looking for nutrients. For this reason, they stop looking for food because they remain weak after a while.
They can live in the depths of the ocean for months and without any nutrition. Plankons are very small living things living in the sea.
