They lived in the top of cement
FALSE
Coral Polyps helped to make the world by building underwater cities
TRUE
Fishing with Cyanide is not another threat to reefs
FALSE
There are only a few limestones in the ocean
FALSE
Tiny coral polyps can rebuild the damaged reefs
TRUE
Living Coral Reefs and cities beneath the sea.
TRUE
Coral reefs´lives have been threatened in recent years.
TRUE
Water pollution damages reefs
TRUE