Narwhals
General Adaptations• Physical characteristics
• Diet/Feeding • Blubber Layer • Countercurrent in Fins 
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Tusk• Morphology
• Debate • Form&Function • The Science
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Diving• Description
• Function • Body Adaptations needed - Lungs, Oxygen to muscles • Heart & Science studies
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Behaviour• Social Structure
• Communication • Breeding • Migration
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