Great White Shark Camouflage Investigation

The video explores the groundbreaking theory that great white sharks can change their skin color for camouflage. Scientists Ryan Johnson and Gibbs Kuguru conduct experiments in South Africa to test this hypothesis, using a color board to measure changes. They also investigate the cellular mechanisms behind color change, focusing on melanocytes and hormonal influences. Comparative studies with other marine species provide additional insights. The research concludes with evidence supporting the theory, suggesting that great whites can subtly alter their color, enhancing their predatory abilities.

What is the groundbreaking theory about great white sharks proposed by the scientists?

• They can communicate with humans.

• They can change their skin color.

• They can fly.

• They can live on land.

What tool did Ryan and Gibbs use to measure the color change in sharks?

• A color board

• A thermometer

• A sonar device

• A GPS tracker

What was the main challenge in proving the color change theory?

• Communicating with sharks

• Training sharks to change color

• Getting accurate color measurements

• Finding enough sharks

What is the role of melanocytes in sharks?

• They help sharks swim faster

• They help sharks detect prey

• They are responsible for pigment and color change

• They allow sharks to breathe underwater

What was the significance of the stingray barb found in the shark's stomach?

• It suggested sharks are scavengers

• It indicated sharks feed on the bottom

• It showed sharks eat only at the surface

• It proved sharks are herbivores

What adaptation is seen in puffadder sharks?

• Biofluorescence

• Leucism

• Flying

• Telepathy

What genetic condition was studied in blacktip reef sharks?

• Gigantism

• Leucism

• Albinism

• Dwarfism

What was the key to proving the color change in great whites?

• Training them to change color

• Observing them in captivity

• Collecting live tissue samples

• Using a special camera

What did the successful hormone tests on live shark skin reveal?

• Sharks cannot change color

• Sharks change color based on mood

• Sharks change color only when hunting

• Sharks can change color hormonally

What was the unexpected result of the adrenaline hormone test?

• It caused the skin to glow

• It made the skin lighter

• It had no effect

• It made the skin darker