The ocean is full of life you can’t see.
From microscopic algae and bacteria to the microorganisms that support entire marine food webs, these tiny organisms play a major role in healthy aquatic ecosystems. They can influence nutrient cycles, water quality, disease, aquaculture, climate processes, and the health of larger marine organisms.
A marine microbiologist studies these microscopic forms of life and their relationships with marine environments.
If you’re interested in biology, the ocean, and the science behind healthy aquatic ecosystems, a career focused on marine microorganisms could be one way to combine those interests.
And you don’t necessarily have to choose between laboratory science and marine conservation. Depending on your role, marine microbiology can involve laboratory research, field sampling, environmental monitoring, aquaculture, water quality, or ecosystem research.
What Is a Marine Microbiologist?
Microbiologists study microorganisms such as bacteria, algae, and fungi. Marine microbiologists apply that scientific focus to organisms and processes associated with oceans, estuaries, coastal environments, and other aquatic systems.
Their work can help scientists understand questions such as:
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How do microorganisms affect marine ecosystems?
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How do changes in water conditions affect microbial communities?
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What role do microorganisms play in nutrient cycling?
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How can microorganisms affect fish and shellfish health?
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How can microbial processes support sustainable aquaculture?
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What can microorganisms tell us about changes in aquatic environments?
Marine microbiology can connect laboratory science with larger questions about ocean health and sustainability.
What Does a Marine Microbiologist Do?
Specific responsibilities depend on the employer and area of specialization, but microbiologists commonly plan and conduct research, collect and analyze samples, study microorganisms, document findings, and communicate research results.
A marine-focused microbiologist might:
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Collect water, sediment, or biological samples
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Identify and analyze microorganisms
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Study microbial communities in marine or aquatic environments
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Conduct laboratory experiments
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Monitor environmental conditions
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Analyze biological and environmental data
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Investigate relationships between microorganisms and aquatic organisms
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Study microorganisms associated with aquaculture systems
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Prepare technical reports and research papers
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Present findings to scientists, managers, or other stakeholders
Some positions are primarily laboratory-based, while others combine laboratory work with field research.
Where Do Marine Microbiologists Work?
Microbiologists work across research, government, testing, manufacturing, and education.
According to the U.S. Bureau of Labor Statistics, microbiologists held about 20,100 jobs in 2025. The largest employment sectors included research and development in the physical, engineering, and life sciences; government; pharmaceutical and medicine manufacturing; testing laboratories; and colleges and universities.
For someone interested specifically in marine and aquatic systems, potential work settings can include:
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Marine research laboratories
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Aquaculture facilities
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Environmental testing laboratories
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Universities and research institutions
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Government agencies
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Fisheries and aquatic resource organizations
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Conservation organizations
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Water quality programs
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Biotechnology companies
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Environmental consulting firms
Marine microbiology can also overlap with fields such as marine ecology, environmental science, fisheries, aquaculture, and conservation.
What Skills Do You Need?
A career studying microorganisms requires a strong scientific foundation, but technical knowledge isn’t the only important skill set.
Biology
Understanding how living organisms function is fundamental to microbiology. Marine microbiologists also need to understand how organisms interact with their aquatic environments.
Laboratory Skills
Microbiologists may work with microscopes, cultures, analytical equipment, and other laboratory tools. Careful procedures and attention to detail are essential.
Field Research
Marine and aquatic research can require collecting samples and observations outside the laboratory. Depending on the job, that could mean working on boats, along coastlines, at aquaculture facilities, or in other aquatic environments.
Data Analysis
Scientists need to interpret experimental and field data and use evidence to answer research questions.
Scientific Communication
Research only creates value when findings can be communicated clearly. Scientists may write reports, publish research, present findings, or communicate results to people outside their field.
Problem Solving
Environmental and biological questions rarely have simple answers. Scientists need to evaluate evidence, identify patterns, and develop new approaches to complex problems.
How Much Do Microbiologists Make?
According to the U.S. Bureau of Labor Statistics, the median annual wage for microbiologists was $87,990 in May 2025, or about $42.30 per hour. The lowest 10% earned less than $54,670, while the highest 10% earned more than $150,000.
Pay varies by industry, experience, location, education, and responsibilities.
Among the major industries employing microbiologists in May 2025, median annual wages included:
| Industry | Median Annual Wage |
|---|---|
| Government | $105,880 |
| Research and development | $105,110 |
| Pharmaceutical and medicine manufacturing | $83,770 |
| Colleges and universities | $67,960 |
| Testing laboratories and services | $59,470 |
These figures represent microbiologists across the occupation, not specifically marine microbiologists.
Is There Demand for Microbiologists?
The outlook for microbiologists is positive.
The Bureau of Labor Statistics projects 6% employment growth for microbiologists from 2025 to 2035, compared with 3% growth for all occupations. About 1,500 openings are projected each year, on average, over the decade.
BLS identifies several factors supporting demand, including pharmaceutical and biotechnology research, biofuels, environmental protection, and public health.
Marine microbiology is part of a much broader scientific landscape. Opportunities can depend on research funding, geographic location, specialization, and the specific needs of employers.
What Degree Do You Need to Become a Microbiologist?
Microbiologists typically need at least a bachelor’s degree in microbiology or a related field, such as biology. Some employers prefer or require a master’s degree or Ph.D., particularly for more advanced research positions.
For someone specifically interested in marine microorganisms, a degree that combines biology with marine and aquatic science can provide a useful foundation.
Study Marine Biology and Sustainable Aquaculture
If you’re interested in the microscopic life that supports aquatic ecosystems, you may also be interested in the larger biological systems those organisms are part of.
Unity Environmental University’s Bachelor of Science in Marine Biology and Sustainable Aquaculture takes a broader look at marine and aquatic life, combining marine biology with sustainable aquaculture and environmental problem-solving.
The program explores marine and aquatic organisms from molecular to ecosystem levels and develops skills in laboratory and field techniques, scientific reasoning, marine conservation, and sustainable aquaculture.
Coursework includes topics such as:
- Introduction to Oceanography
- Diversity of Marine and Aquatic Vegetation
- Marine Mammal and Seabird Biology
- Marine and Aquatic Organism Biology
- Aquaculture Systems and Sustainability
- Marine Conservation
- Scientific and Quantitative Reasoning
That combination can be valuable if your interests extend beyond microorganisms to the broader biological systems that make aquatic environments function.
What Can You Do With a Marine Biology Degree?
Marine microbiologist is one potential direction for someone interested in microorganisms and aquatic environments, but it is not the only career connection.
A bachelor’s degree in marine biology and sustainable aquaculture can also support career paths related to:
- Marine biology
- Aquaculture
- Fisheries
- Marine conservation
- Aquatic resource management
- Biological research
- Environmental monitoring
- Wildlife biology
- Laboratory science
- Environmental consulting
- Biological technician roles
BLS classifies marine biologists within the broader zoologists and wildlife biologists occupational category. These professionals study animals and their interactions with ecosystems, and BLS specifically notes that marine biologists study fish and other wildlife that inhabit the oceans.
For that occupation, BLS reports a $76,780 median annual wage in May 2025 and projects 4% employment growth from 2025 to 2035, with approximately 1,400 openings per year.
The degree can also prepare students for biological technician roles. BLS reports a $57,510 median annual wage for biological technicians in May 2025, with employment projected to grow 7% from 2025 to 2035. Biological technicians typically need a bachelor’s degree in biology or a related field.
Marine Biology Meets Sustainable Aquaculture
The ocean isn’t just an ecosystem to study. It is also an important source of food, livelihoods, and natural resources.
Sustainable aquaculture focuses on producing aquatic organisms while reducing environmental impacts and supporting long-term resource management.
That makes aquaculture another important area for marine biology graduates.
Understanding aquatic organisms, ecosystems, water conditions, and environmental interactions can help professionals work toward more sustainable approaches to producing fish, shellfish, seaweed, and other aquatic resources.
The Unity program specifically examines aquaculture systems, species, and practices with an emphasis on environmental and systemic sustainability.
Is Marine Biology Right for You?
A career in marine biology or aquatic science could be a good fit if you’re curious about how life functions in oceans, lakes, rivers, coastal environments, or aquaculture systems.
You might be fascinated by microscopic organisms.
You might want to study marine mammals or seabirds.
You might be interested in sustainable aquaculture.
Or you might want to help protect aquatic ecosystems through research, conservation, or environmental management.
A marine biology degree can give you the scientific foundation to explore those interests while developing skills that can be applied across marine and aquatic careers.
Start Your Career in Marine Biology and Sustainable Aquaculture
The ocean depends on countless interconnected organisms, from microscopic life forms to some of the largest animals on Earth.
Understanding those connections can help scientists and environmental professionals develop better ways to study, manage, and protect aquatic ecosystems.
Unity Environmental University’s online Bachelor of Science in Marine Biology and Sustainable Aquaculture combines marine biology, aquatic science, conservation, and sustainable aquaculture to prepare students for careers connected to the health and responsible use of aquatic environments.
If you’re ready to take your interest in marine life beyond the surface, explore the BS in Marine Biology and Sustainable Aquaculture.
