According to Breder and Rosen (1966. Modes of Reproduction in Fishes. T.F.H. Pub. Pp. 263-264.), "Efforts were made over long periods at the New York Aquarium to induce reproduction in this species. They were always unsuccessful and always resulted in the survival of only one fish after a period of a week." I guess this means that like with so many catfish families, we just don't know, yet, what the necessary trigger for spawning these fish is.