Most of the world's coral reefs are found in tropical waters. Coral reefs thrive in warm, shallow, clear waters with a temperature range between 18C and 34C, and they are predominantly located in the tropics.

More than one-third of the world's coral reefs are located in the territories of Australia, Indonesia, and the Philippines. These countries have some of the largest and most diverse coral reef ecosystems in the world.

Coral reefs host a far greater number of animal phyla compared to tropical rainforests. Coral reefs are known for their high biodiversity, hosting a wide variety of marine species, including many unique and specialised organisms. In contrast, tropical rainforests, while also highly diverse, host a relatively smaller number of animal phyla.

Therefore, all three statements are correct.