Submerged in shallow tropical waters, coral reefs are the natural habitat for a quarter of all marine species. Though maintaining a coral reef system is a common challenge for many aquarists, some of the most colorful and popular fish in the hobby are drawn from these calcified sanctuaries. While coral reefs offer a wide range of diverse species, only five families comprise the bulk of reef communities: gobies, wrasses, groupers, damsels, and cardinalfish.
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