How can geography affect and determine marine life?

Geography significantly influences marine life through factors like ocean currents, water temperature, and nutrient availability, which vary by region. Coastal features such as reefs, estuaries, and mangroves provide distinct habitats that support diverse ecosystems. Additionally, geographical barriers, like land masses and continental shelves, can restrict species distribution and promote unique adaptations. Overall, the interplay of these geographical elements shapes the abundance and diversity of marine organisms in different areas.