Fish are found in an extraordinary range of habitats, from mountain streams to hot springs and at depths below 7,000 meters. There are some 20,000 species of fish and the Maldivian reefs and seas boas
The Maldivian reefs host extraordinary marine diversity — and most of it is accessible from the beach with just a snorkel mask. No certification required. © Nattu from Male', Maldives, CC BY 2.0, via Wikimedia Commons

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