FACT

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

Source: Shark Anatomy - Georgia Aquarium

FACT

Sharks can lose and regrow thousands of teeth in their lifetime, with some species growing new teeth every two weeks.

Source: Shark Teeth Facts - American Museum of Natural History

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

While rare, sharks can and do get cancer. This misconception led to harmful cartilage supplement marketing.

Source: Do Sharks Get Cancer? - Journal of Cancer Research

MYTH

Some shark species can pump water over their gills while stationary. Only certain species like great whites need to keep moving.

Source: How Sharks Breathe - ReefQuest Centre