habitat — , a natural home for a plant or animal, biodiversity — , the variety of living things in an area, coral reef — , a rocky structure made by tiny animals; home to many species, overfishing — , catching fish faster than they can reproduce, bycatch — , sea animals caught by accident while fishing, microplastics — , very small pieces of plastic, algae bloom — , fast growth of algae, often caused by pollution/nutrients, dead zone — , an area with very low oxygen where few organisms survive, ocean acidification — , ocean becoming more acidic because it absorbs CO₂, coral bleaching — , coral turning white and becoming weak or dying, marine protected area — , ocean zone protected by rules to help nature recover, sustainable — , using resources without harming the future.

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