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Specific information is lacking. But the frequency of feeding definitely depends upon the season. In the summer, Narwhals feed in shallower waters. They typically prey on fishes that dwell in the uppermost, sunlit zone of the ocean. They dive less deeply. There's enough dissolved oxygen in the water that they can stay down for longer periods of time. In fact, they're known to stay down for as long as almost a half hour at a time. In the winter, narwhals feed in deeper waters. They typically prey on fishes that dwell in the middle, dimly lit zone of the ocean. They dive much deeper than in summer. There's much, much less dissolved oxygen in the middle zone of cold temperatures and high pressure. So narwhals may dive more than 15 times a day for their food.

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16y ago

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