ca. 1860, [carte de visite portrait of a “Monkey Fish of Japan”, one of many of such specimens created during the 18th and 19th centuries. This particular “merman” was later purchased by P.T. Barnum and shown at the Chinese and Japanese Warehouse on Regent Street in London], Gush and Fergusson
via Ordinary Light
More information: A BBC video on how the Horniman Museum’s monkey-fish was created.