Understanding the Importance of Sharks in the Marine Ecosystem

What is a common misconception about sharks?

• They are not part of the marine ecosystem.

• They are the smallest marine animals.

• They are bloodthirsty and dangerous.

• They are friendly creatures.

Approximately how many sharks are hunted by humans each year?

• 50 million

• 10 million

• 1 billion

• 100 billion

What could happen if sharks disappeared from the food chain?

• Algae-eating fish would thrive.

• Corals would flourish.

• The population of smaller fish would decrease.

• Algae would overgrow, blocking sunlight.

How do sharks help maintain the health of marine populations?

• By eating only plants.

• By feeding on weak or ill marine animals.

• By avoiding all other marine life.

• By reproducing rapidly.

What is one consequence of losing sharks in the marine ecosystem?

• Stability in the marine food chain.

• Spread of illness among marine animals.

• Improved health of marine populations.

• Increased genetic diversity in marine species.

How does the presence of sharks influence other marine creatures?

• It has no effect.

• It causes them to migrate.

• It influences their behavior.

• It makes them more aggressive.

What is a significant ecological impact of shark extinction?

• Increased fish population.

• Collapse of the marine ecosystem.

• More sunlight reaching corals.

• Decrease in algae growth.

What is one way humans can help protect sharks?

• By increasing the demand for shark products.

• By spreading awareness and reducing demand for shark products.

• By hunting more sharks.

• By ignoring the issue.

Since 1970, by what percentage has the population of oceanic sharks dropped?

• 90%

• 30%

• 71%

• 50%

How many great white sharks are estimated to be left in the world?

• 1,000

• 10,000

• 5,000

• 3,500