Which group's swimming propulsion method do walruses resemble when moving underwater?
Answer
True seals
When a walrus engages in swimming, the primary mechanism used for underwater propulsion more closely mirrors that of the true seals (Phocidae). This propulsion relies predominantly on side-to-side sculling or sweeping movements generated by the rear flippers. This contrasts sharply with the movement pattern of eared seals, which utilize wing-like strokes generated by their large foreflippers for primary thrust. This difference in swimming style is part of the compromise in the walrus's anatomy, balancing efficient aquatic movement with the specialized terrestrial mobility required for hauling out onto ice or land.
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