The Platypus feeds mainly during the night on a wide variety of aquatic invertebrates. The average feeding length lasts for 10-12 hours per day. The animal closes its eyes, ears and nostrils when diving underwater to hunt, instead it relies on its primary sense organ which is the bill. The bill is equipped with receptors sensitive to pressure, and with electro-receptors. The Platypus stays underwater for between 30-140 seconds, collecting the invertebrates from the river bottom and storing them in its cheek-pouches. It then chews the food using its grinding plates(because it doesn't have teeth), while it floats and rests on the water surface.Diet of the Platypus consists mainly of shrimp, insect larva, earthworms, crayfish & trout eggs. The young have a completely different diet however, as they do not get fed food, instead, the mother feeds the young with milk that comes out of pores on her stomach, and they are called pores because platypuses actually lack a protruding nipple from their abdomen, but that isn't necessary for the feeding process anyway. Instead, the mother lays on her back while the babies slurp up the milk pouring out of her pores. The milk that the mother platypus feeds her young is rich in all sorts of good vitamins and minerals to make sure her young grow up healthy.