Reproductive mode of the tawny nurse shark, Nebrius ferrugineus (Elasmobranchii: Ginglymostomatidae) in Okinawa waters, with comments on individuals lacking the first dorsal fin. In Seret, B. and Sire, J.Y. (Eds) Indo-Pacific fish biology: Proceedings of the 5th Indo-Pacific Fisheries Conference, Noumea, 1997. Ichthyological Society of France, Paris: 329–333, figs 1–2
