Corals are alive, and make up huge "reefs" (there are usually around 40 different species of coral in each reef, although more than 350 live in the Great Barrier Reef along Australia!).
(Corals; are; alive) (Corals; make up; huge "reefs) (more than 350; live; L:in the Great Barrier Reef along Australia)
Corals Corals more than 350
are make up live
alive
huge "reefs
L:in the Great Barrier Reef along Australia