Lobsters: for gourmets the most refined crustaceans, for marine biologists the most fascinating subjects for research. Lobsters are caught on a large scale all over the world. And their number is decreasing dangerously. Lobsters along the eastern coasts of Canada and the USA have been filmed for various years. Spectacular images also come from the North Sea near the Island of Helgoland where a few samples still survive; of the 70000 living in the Thirties, there now are only 100.