Dr. Hansen was a researcher at the Zoological Museum located at the University of Copenhagen, Denmark. Much of his work was devoted to echinoderms, in particular, Holothuroidea.

Relevant to the biota of the Gulf of Mexico, Dr. Hansen has published the following:

Hansen, B., 1975. Systematics and Biology of the Deep-Sea Holothurians, Part 1: Elasipoda. Scientific Results of the Danish Deep-Sea Expedition Round the World. Galathea Report, Vol. 13: 1–262.

[Information regarding Dr. Hansen's passing is missing. Please let us know if you have this information]