Marine biology
Marine biology' is the study of any living plant or animal in the sea. Marine biologists are the people who study it. Like other scientists, marine biologists must know a lot about the creatures they are studying. They also must understand how the sea works. The study of how the sea works is oceanography. There are many kinds of marine animals and plants to study. You can learn about it on the Internet, and, if it seems interesting to you, you might even want to pursue it as a career.