The article delves into the impact of climate change on marine ecosystems, highlighting the alarming consequences of rising sea temperatures and ocean acidification. Scientists have observed widespread coral bleaching, shifts in fish populations, and disruptions in marine food chains due to these environmental changes. The decline in biodiversity and productivity in marine ecosystems poses a significant threat to global food security and the livelihoods of coastal communities. Urgent action is needed to combat climate change and protect these vital ecosystems. Governments, industries, and individuals must work together to reduce carbon emissions, promote sustainable fishing practices, and support the conservation of marine species. By taking proactive measures now, we can help preserve the health and resilience of our oceans for future generations.