The cost of becoming a marine biologist depends on the school and degree level.
Undergraduate: Average tuition is about $25,000 per year at public institutions and $45,000 per year at private institutions.
Graduate: A master's degree averages $15,000 per year at public schools and $25,000 at private schools. A doctoral degree averages $20,000 per year publicly and $35,000 privately.
Additional expenses include books, supplies, research equipment, and travel. Total costs vary significantly by institution and program length.