• The greatest marine biodiversity occurs in coral reefs, estuaries, and the deep-ocean floor• Biodiversity if higher near coasts than in the open sea because of the great variety of producers and habitats in coastal areas• Biodiversity is higher in the bottom region of the ocean than in the surface region because of the great variety of habitats and food sources on the bottom

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1. • The greatest marine biodiversity occurs in coral reefs, estuaries, and the deep-ocean floor
• Biodiversity if higher near coasts than in the open sea because of the great variety of producers and habitats in coastal areas
• Biodiversity is higher in the bottom region of the ocean than in the surface region because of the great variety of habitats and food sources on the bottom