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Examples of suction feeding and biting (pierce feeding) for bearded, harbor, ringed, and spotted seals.

Comparative feeding strategies and kinematics in phocid seals: suction without specialized skull morphology

Sarah S. Kienle, Holly Hermann-Sorensen, Daniel P. Costa, Colleen Reichmuth, and Rita S. Mehta

Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.179424