Carrier Crab Behavior and Adaptations

In the Lembeh Strait, Indonesia, the carrier crab is observed using its unique defense mechanism. This crab carries objects like dead coral or seaweed on its back to protect itself. Sometimes, it even uses living creatures like sea urchins as shields. The crab cleverly uses the sea urchin's spines as a weapon when threatened and can also hide in the sand, leaving its shield exposed for protection.

Where is the carrier crab observed in the video?

• In the Sahara Desert

• In the Lembeh Strait, North Sulawesi, Indonesia

• In the Amazon Rainforest

• In the Great Barrier Reef

What unique feature do the carrier crab's back legs have?

• They are used for swimming

• They are used for climbing

• They are used for digging

• They are specially modified to carry objects

What types of objects does the carrier crab carry for protection?

• Various objects including dead coral, seaweed, and sometimes living creatures

• Only living creatures

• Only dead coral

• Only seaweed

How does the carrier crab use a sea urchin?

• As a food source

• As a means of transportation

• As a tool for digging

• As an underwater defense shield

What does the carrier crab do if its defense strategy with the sea urchin fails?

• It swims away quickly

• It hides in the sand, leaving the sea urchin exposed

• It drops the sea urchin and runs

• It uses its claws to fight