Backbone of Biodiversity at Risk

The International Union for the Conservation of Nature (IUCN) maintains the Red List of Threatened Species, an inventory of the global conservation status of plants and animals. In a 2010 study, researchers concluded that one-fifth of the world's vertebrates (animals with backbones) are threatened with extinction. Meet some of the marine vertebrate species that are among those threatened in this image gallery.

Hawaiian monk seals are among the wildlife found within the Papahānaumokuākea World Heritage Site.

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