Crab Migration and Challenges

Crabs have evolved to live on land but must return to the ocean to hatch their young. They embark on a challenging migration, facing dehydration and road crossings. A significant threat comes from yellow crazy ants, which have drastically reduced the crab population. Finally, the crabs reach the beach, where they replenish themselves in the ocean.

What is the primary reason crabs migrate to the ocean?

• To find food

• To escape predators

• To avoid the sun

• To hatch their young

What natural challenge do crabs face during their migration?

• Dehydration from the sun

• Cold temperatures

• Heavy rainfall

• Strong winds

How were yellow crazy ants introduced to the crabs' habitat?

• Through scientific experiments

• By cargo ships

• Through natural migration

• By tourists

What effect did the yellow crazy ants have on the crab population in the 1990s?

• Increased it by a third

• Had no effect

• Reduced it by a third

• Doubled the population

What do crabs do when they reach the beach?

• Lay eggs

• Restore their bodies with salts and moisture

• Fight predators

• Build nests

What is the final challenge crabs face before reaching the ocean?

• Navigating a forest

• Crossing a river

• Climbing a mountain

• A forty-foot descent