Ocean warming affects marine ecosystems by altering temperature and chemistry of ocean waters, which impacts species distribution, breeding cycles, and food availability. Warmer temperatures can lead to coral bleaching, loss of biodiversity, and shifts in community structures. Sensitive species like shrimps and fish may face decline due to habitat loss and changes in ocean currents. Additionally, changes in nutrient cycles can disrupt the entire marine food web, affecting everything from phytoplankton to top predators. The overall health of marine ecosystems is vital for maintaining global climate stability and food resources.