To become a marine biologist, you will likely need at least a bachelor's degree, and possibly graduate work, such as a master's or Ph.D.degree. Since marine biology jobs are competitive, it will usually be easier to get a position if you have gained relevant experience during high school or college.he salary of a marine biologist depends upon their exact position, their experience and qualifications, where they work, and what they are doing. It can range from a volunteer experience as an unpaid intern to an actual salary of about $35,000-$110,000 per year. More ».