What it is
Marine biology & biological oceanography is the study of life in the oceans — from microscopic plankton to whales, and the ecosystems and conservation of the marine world. It combines biology with oceanography, ecology, and environmental science.
It's a popular, passion-driven field, and an honest guide should note it's competitive — the best opportunities favor graduate study and flexibility about location and role.
What you'll study
Study blends biology with ocean and environmental science:
- Year 1–2Biology, chemistry, calculus/statistics
- Year 2–3Marine biology, ecology, oceanography, genetics
- Year 3–4Marine ecology/conservation, invertebrate/fish biology, and field/lab research
Expect fieldwork (diving, boats, coastal research), lab work, and often a research or field-station experience.
Concentrations & focus areas
- Marine Ecology & ConservationEcosystems and protection
- Marine Organismal BiologyFish, mammals, invertebrates
- Biological OceanographyOcean systems & plankton
- Fisheries ScienceManaging marine resources
- Marine Genetics / PhysiologyMolecular and functional
- Environmental / Climate FocusOceans and climate
Skills you'll build
- Field research skillsDiving, sampling, data collection
- Lab techniqueAnalysis and identification
- Data analysisEcological and statistical
- Environmental awarenessConservation science
- CommunicationScience outreach
Careers & job titles
- Marine biologist / field researcherResearch and conservation
- Zoologist / wildlife biologistGovernment and NGOs
- Fisheries / conservation scientistResource management
- Environmental scientistConsulting and agencies
- Aquarium / education / outreachPublic science
- Research scientist (PhD)Academia and institutes
Job outlook & demand
Marine biology is a competitive field: related occupations like zoologists and wildlife biologists grow about as fast as average, but positions are limited relative to interest. Success often means graduate study, willingness to relocate, and combining marine biology with in-demand skills (data, fisheries, environmental compliance).
Pay: median, range & trajectory
Pay is modest relative to lab-science fields. Per the U.S. Bureau of Labor Statistics, related zoologists and wildlife biologists had a median around $70,600, and environmental scientists ~$80,060. Entry field/technician roles pay less; PhD-level research and specialized roles pay more.
Degree levels it's offered at
Offered across these levels — click a level to learn about it:
A bachelor's supports field/technician and education roles; a master's or PhD is usually needed for research and career advancement.
Is it right for you?
You might thrive here if you love the ocean and wildlife, enjoy fieldwork (including diving and boats), and are motivated by conservation and discovery.
Honest note: it's competitive and not the highest-paying. If job security matters, consider pairing it with environmental science, fisheries, or data skills, and plan for graduate study.
Explore further
Keep exploring:
Key facts
- FocusLife in the oceans and marine ecosystems
- InvolvesFieldwork, diving, lab and data analysis
- CareersMarine biologist, conservation/fisheries scientist, researcher
- RealityCompetitive; grad study and flexibility help
- Pay~$70,600 (zoologists, BLS)
Where to learn more
Authoritative sources for careers and pay: