1. Corals grow in a. lakes b. oceans c. rivers

2. The polyps’ mouths are covered in a. teeth b. taste buds c. tentacles

7. Coral is made from the skeletons of a. fish b. crabs c. polyps

8. Coral is important because a. tourists like to snorkel there b. young fish hide in it c. people can eat it

5. Corals get their colours from a. algae b. sun c. the fish that live in them

4. Coral reefs are home to a. most sea creatures b. a quarter of sea creatures c. half of sea creatures

6. Corals evict their algae because a. the algae is too heavy b. they are stressed c. they like to be clean

3. Corals cover the ocean floor by approximately a. 1% b. 5% c. 7%