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Blowhole - Whale AnatomyWhale DefenseBaleen -Whale AnatomyWhale AnatomyWhales - 3rd-5th Grade Research ActivityToday's featured page: Writing an Animal Report plus Rubric


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ALL ABOUT WHALES!
What is a Whale? Whale Information Sheets Anatomy and Behavior Extreme Whales Whale Myths Whale Evolution Whale Classification Whale Glossary Whale Activities Whale Index

WHALE ANATOMY AND BEHAVIOR
General Anatomy Size Pods The Senses Baleen
Reproduction Diet Flukes Sleep Offense/
Defense
Blowhole

SLEEP

Whales sleep about 8 hours each day. Whales don't go into a deep sleep like we do, because they have to be partially conscious to breathe. Whales are able to partly sleep by letting one half of their brain sleep at a time. This is called unihemispherical sleeping.

Scientists have performed EEG sleep studies on dolphins. They found that during their light sleep, dolphins are rarely (if ever) in REM (Rapid Eye Movement) sleep. This level of sleep has been associated with dreaming in humans.



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