MYTH

Sharks don't sleep in the traditional sense, but they do have periods of rest and reduced activity.

Source: Do Sharks Sleep? - Discovery Channel

MYTH

Recent studies show that many sharks can see in color, though not as well as humans.

Source: Shark Vision Research - Journal of Experimental Biology

FACT

Sharks have skeletons made entirely of cartilage, the same flexible material in human ears and noses.

Source: Shark Anatomy - Georgia Aquarium

FACT

Sharks have special organs called ampullae of Lorenzini that can detect the electrical fields of other animals.

Source: Shark Magnetic Navigation - Current Biology

MYTH

While sharks have an excellent sense of smell, they can only detect blood from about a quarter mile away under ideal conditions.

Source: Shark Sensory Biology - Florida Museum