Question

The Great Coral Reef almost circles New Zealand it has more marine life than anywhere else in the world
Ms. Sue
That's a runon sentence. How do you think you should correct it?

martin
The Great Coral Reef almost circles New Zealand and it has more marine life than anywhere else in the world.
Ms. Sue
That's fine, Martin, except that you need a comma before "and." Your sentence has two independent clauses that need to be separated by a comma.