Ernst Haeckel died in Germany on August 9th 1919. He was 85 years, 5 months and 24 days old when he died.
Ernst Barlach died on October 24, 1938 at the age of 68.
Ernst Scheller died on January 16, 1942 at the age of 42.
Sea life, radiolarian (various marine protozoans) to be exact.
Ernst Haeckel was born on February 16, 1834.