Marine biology is important because it helps us understand and protect the ocean’s vast biodiversity, which supports essential ecosystem functions and human well-being. The oceans cover over 70% of Earth’s surface and are home to diverse species that maintain ecological balance, such as producing oxygen, cycling nutrients, and controlling food webs. Studying marine life allows us to monitor environmental changes, sustain fisheries that provide food for millions, and safeguard habitats from human impacts like pollution and climate change. Marine biodiversity also ensures ecosystems remain resilient, meaning they can recover from disturbances and continue providing services like carbon storage and water filtration. Additionally, marine biology contributes to medicine by discovering new drugs from marine organisms. Overall, it is crucial for conserving marine ecosystems, managing ocean resources sustainably, and supporting global food security and environmental health.