Above, two reef building corals (millepora), a diving bird, a narwhal (monodon), a mollusc and a musk deer; below, a small… https://www.rawpixel.com/image/13956804/image-cartoon-sea-animalFree Image from public domain licensePaarelduikers-spel (1870 - 1899) by anonymous and anonymous https://www.rawpixel.com/image/13780620/paarelduikers-spel-1870-1899-anonymous-and-anonymousFree Image from public domain license