Sea Urchin Quiz

Where do sea urchins mostly live?

• Lakes

• Rocky shores, coral reefs, and deep underwater

• Muddy riverbeds

• Sandy beaches

What do sea urchins eat to keep the underwater plants from growing too much?

• Seaweed

• Algae

• Coral

• Fish

What is the special part in a sea urchin's body used to scrape algae off rocks?

• Tiny eyes

• Suction cups

• Aristotle's lantern

• Sharp spines

What are sea urchins called in Japan and considered a delicious food?

• Tempura

• Sushi

• Uni

• Sashimi

What do sea urchins help keep healthy by eating algae?

• Coral reefs

• Underwater caves

• Seaweed forests

• Mangrove swamps

What are some predators of sea urchins?

• Sharks

• Whales

• Sea otters

• Dolphins

What do some sea urchins have in their spines to protect themselves?

• Venom

• Poisonous gas

• Electric shock

• Camouflage

What special feature do some sea urchins have to help them cling onto rocks?

• Strong claws

• Adhesive tentacles

• Tiny Hands

• Tubed Feet

What role do sea urchins play in the underwater world?

• Building coral reefs

• Hunting for food

• Cleaning the ocean floor

• Creating underwater caves