Marine organisms are a diverse group of living beings that inhabit the world's oceans and seas. They range from the smallest plankton to the largest whales, playing crucial roles in the marine ecosystem. These organisms are vital for maintaining the balance of oceanic environments and contribute significantly to global biodiversity. In addition to fish, marine organisms include various species of coral, sea turtles, and marine mammals. Each of these groups has unique adaptations that allow them to thrive in their aquatic habitats. Understanding marine organisms is essential for conservation efforts and ensuring the health of our oceans.