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Five key factors contributing to the decline of fish species in the ocean include overfishing, which depletes fish populations faster than they can reproduce; habitat destruction, such as coral reef degradation and coastal development; pollution from agricultural runoff and plastic waste, which harms marine ecosystems; climate change, leading to ocean warming and acidification that disrupts fish habitats; and invasive species that outcompete native fish for resources. Together, these factors create a challenging environment for fish species to thrive.

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