Stejneger's Beaked Whales occur mostly in deep water beyond the edge of the continental shelf (Houston 1990; Loughlin and Perez 1985). A peak in strandings in Japan during winter and spring suggests that they migrate northward in summer (Mead 1989; Yamada 1997). Based on evidence from bite wounds from cookiecutter sharks (Isistius spp.), Walker and Hanson (1999) also suggested Stejneger’s undergo seasonal movements to warmer waters where this shark is more common (Dwyer and Visser 2011). Stomach contents from stranded animals in the western Aleutian Islands and Japan were dominated by two squid families – Gonatidae and Cranchiidae; all squid were presumed to have been taken at depths of 200 m or more, and no fish remains were found (Yamada et al. 1995, Walker and Hanson 1999). Pod sizes of up to 15 animals were reported by Loughlin et al. (1982), but species identification for their sightings cannot be confirmed (Pitman et al. 2019).