Fritz Haas (January 4, 1886 – December 26, 1969, Hollywood) was a Jewish[1] German zoologist born in Frankfurt-am-Main. He specialized in the field of malacology.
From 1911 to 1936 he was a curator of invertebrate zoology at the Senckenberg Museum in Frankfurt am Main. He was trained in biology by herpetologist Oskar Boettger and malacologist Wilhelm Kobelt. From 1938 to 1959 Haas was curator at the department of lower invertebrates at the Field Museum of Natural History in Chicago.
Haas' specialty involved the study of land and freshwater snails, as well as research of the family Unionidae (freshwater mussels). He performed extensive field research in Norway (1910), Western Europe (1914-19), southern Africa (1931-32; as part of the Hans Schomburgk expedition) and the Americas (1937 and after).
On June 30, 1936, Haas was removed from his position at the Senckenberg Museum by the Nazis. Among his better known written works was a 1969 monograph titled Superfamilia Unionacea. In 1969 Haas combined over 4000 names from the family Unionidae into 837 recognized species.[2]