R & C | ICHTHYOLOGY | SHARKS: FACT AND FANTASY

Shark Smell

Sharks have two nostrils through which some can detect odors up to 91 meters away (about the length of a football field). Some species can smell one molecule of blood in over one million molecules of water - that's equal to one drop of blood in 94 liters (25 gallons) of water. Some sharks hunt for food like dogs following scent trails. They swim back and forth searching for trails of scent and then follow the strongest one.