- Callorhinus ursinus, Northern fur seal
- Mori, J., Kubodera, T. & Baba, N., 2001. Squid in the diet of northern fur seals, Callorhinus ursinus, caught in the western and central North Pacific Ocean. Fisheries Research, 52, pp.91-97.
- Boletzky, Sv. & Hanlon, R.T., 1983. A Review of the Laboratory Maintenance, Rearing and Culture of Cephalopod Molluscs. Memoirs of the National Museum of Victoria: Proceedings of the Workshop on the Biology and Resource Potential of Cephalopods, Melbourne, Australia, 9-13 March, 1981, 44, pp.147-187.