Habitat Type: Marine
Comments: Pelagic, prefers deep water, sometimes around islands or in shallow shelf waters (e.g., 40-70 m; Scott and Sadove 1997). Tend to occur in highest densities near productive waters, and often near steep drop-offs or strong oceanographic features, e.g. edges of continental shelves, large islands, and offshore banks and over submarine trenches and canyons (Gosho et al. 1984, Reeves and Whitehead 1997, Gregr and Trites 2001, Whitehead 2003). Females generally restricted to waters with surface temperatures warmer than about 15 degrees C and rarely found in waters less than 1000 m deep. Males, although primarily found in deep water, are sometimes found in waters 200 to 1000 m deep (Reeves and Whitehead 1997).