"Great White Shark." Wikipedia, The Free Encyclopedia. 5 April 2008, at 23:51 UTC. Wikimedia Foundation, Inc. 22 April 2008. http://en.wikipedia.org/wiki/Great_white_shark

Shark Feeding: Teeth

"Shark." Wikipedia, The Free Encyclopedia. 19 April 2008, at 16:16 UTC. Wikimedia Foundation, Inc. 22 April 2008. http://en.wikipedia.org/wiki/Shark?#Respiration

Shark: Hunting

Hungry Sharks

• Listen for irregular sounds
• Low Frequency
• Most likely made by a struggling animal

http://www.slate.com/id/2121637/

Shark Hunting: Tactics

Sharks eyes, ears, and nose are all located near its ventral mouth

• Sharks: Senses in the likely order they are used to find food:
  • Smell
  • Sound
  • Sight
  • Lateral line
  • Electroreception
  • Touch (bump prey)
  • Taste, in the back of the throat, as they swallow food
• Smell
  • Extremely keen sense of smell
  • Can sense 1 drop of blood in 1,000,000 drops of water
    • Can smell blood up to 1/4 mile away
• Sound
  • Very sensitive to low frequency sound
  • Can hear sounds miles away
  • Great directional hearing
  • Endolymphatic pores cover the sharks head
    • Endolymphatic pores: pores with which sharks hear
• Sight
  • Sharks have great eyesight
    • even in dim light
  • Sharks have fine light sensitivity even with the slightest change in light
• Electroreception
  • Can detect electricity
  • Electricity is emitted in small amounts by all living beings
http://www.slate.com/id/2121637/
http://www.enchantedlearning.com/subjects/sharks/anatomy/Senses.shtml
 

Note multiple rows of teeth visible in lower jaw.

 

 

Picture: R.M. Deeley (sciencebugz.com)

Bibliography

http://www.enchantedlearning.com/subjects/sharks/anatomy/Senses.shtml

http://www.enchantedlearning.com/subjects/sharks/anatomy/Skin.shtml

http://www.slate.com/id/2121637/