There are many academic paths that lead to the career of a marine biologist. It is recommended that you take courses such as chemistry, biology, physics and advanced mathematics while in high school. After completion of your high school education, you may opt for a bachelor's degree in marine biology or in one of the sciences such as biology, chemistry, physics and mathematics. If you choose the latter, you may have to earn a master's degree in marine biology before starting work in the field and/or research. However, if you have a bachelor's degree in marine biology, you may intern or begin a job under the supervision of an experienced marine biologist. For all research and higher teaching positions, you will be required to attain a Ph.D. in marine biology with experience in field and research.