Orcas patrol waters far from the coast and use teamwork to kill.
Those observations by scientists from the University of British Columbia Institute for the Oceans and Fisheries are notable because deep-water-grazing orcas may represent a new subcategory of killer whales, according to another study in
, PLOS, CC-BY 4.0 Researchers observed how transient killer whales in Monterey Bay, California spent their time through 270 hours of behavioral observations. Foraging accounted for 84.16% of the time spent by orcas, with other activities including traveling, socializing and resting. Additionally, this study presents the main targeted prey species: mostly California sea lions, and grey whale calves.
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