[1] In 1917, Ginsburg worked as an aid for the Division of Fishes at the United States National Museum.

[1] He was one of the first ichthyologists to note the subtle differences between fish from the gulf and those from the southeastern United States.

[2] Ginsburg intended to start a large project devoted to the study of the gulf fish, but most of his time was ultimately spent on the revisionary work which was required.

[citation needed] A sign attesting to this fact hung for many years in the Citarella fish market in Manhattan.

[citation needed] He retired from the Bureau of Commercial Fisheries in 1956 and became a Research Associate of the Fish Division, U.S. National Museum, for three years starting in 1957.