OHIO student scuba diving during her internship in Thailand
Marine, Freshwater and Environmental Biology Major (B.S.)

Marine, Freshwater and Environmental Biology Major (B.S.)

In the Marine, Freshwater, and Environmental Biology major, students prepare for careers with a focus on marine and freshwater organisms and their environments.

Courses meet the requirements for admission to graduate programs in marine biology, zoology, ecology, and conservation biology. The program also provides the necessary background for jobs with state and federal agencies (i.e., USDA or EPA) charged with environmental protection, research and monitoring, and information collection.

Careers with a Marine, Freshwater, and Environmental Biology Degree

Marine, Freshwater, and Environmental Biology courses meet the requirements for admission to graduate programs in marine biology, zoology, ecology, and conservation biology. The program also provides the necessary background for jobs with state and federal agencies (i.e., USDA or EPA) charged with environmental protection, research and monitoring, and information collection.

Biology Careers & Internships

Kelly Love looking at insects she collected.

Admission Requirements

In the past, Biological Sciences had a very strong admission requirement of a PL1-level math placement. With the implementation of the test optional admission pathway, this requirement is no longer in place. However, achievement of PL1-level math placement can be a good indicator of strong preparation in math. After admission to Ohio University, first-year students may transfer into a Biological Sciences major if they have earned a grade of ā€œCā€ or better in both BIOS 1700 and BIOS 1705 and have a minimum accumulative GPA of 2.5 at Ohio University.

For information about changing your major to biological sciences or transfer admissions requirements, view the academic catalog.

OHIO Admissions

  • Tuition and Fees

    OHIO is committed to your lifelong success through our Guarantee+, which offers fixed tuition and fees, a graduation plan and lifelong benefits to our students. We're continuously striving to make college more affordable and accessible, while maintaining the high quality and value of an OHIO education.

    Tuition & Fees

  • Financial Aid & Scholarships

    Our Office of Student Financial Aid and Scholarships provides services to students and parents both in-person and remotely. You can visit our office on the ground floor of Chubb Hall or reach us at financial.aid@ohio.edu or 740.593.4141.

    Financial Aid & Scholarships

Marine, Freshwater and Environmental Biology Major (B.S.) Courses & Curriculum

View Courses & Degree Requirements in the Official Academic Catalog

Students must complete a total of 37 semester credit hours of BIOS coursework, including courses in ecology, aquatic and organismal biology plus an internship.

Social science electives can be chosen to meet the requirements of the Environmental Studies Sustainability and Resilience Undergraduate Certificate.

Graduate Opportunities at OHIO

Ph.D. and M.S. Biology Degrees

Ohio University offers M.S. and Ph.D. Biological Science programs in three concentration areas: 

  • Cell, Developmental and Microbiology
  • Ecology and Evolutionary Biology
  • Physiology and Neuroscience 

Biological Sciences Graduate Degrees

OHIO also offers a Master of Science in Environmental Studies and an Online Master of Sustainability, Security and Resilience

Student Success Stories

Grace Vance Studied How Whiskers Help Seals Sense Their Environment

In her internship, Grace Vance participated in a project that explored eared seals' hydrodynamic perception, i.e. how they use their whiskers to sense water movements and detect predators and food sources. Her summer internship was at the Marine Science Center located in Rostock, Germany.

About Grace Vance's Internship

Grace Vance poses with the eared seals she studied, examining their vibrissae to understand their hydrodynamic perception.

Fair Pape Dived into Marine Survey Internship in Thailand

Fair Pape put her experience in OHIO's Scuba Diving Club to use in her summer internship with Global Reef in Thailand, where she actively contributed to coral restoration effects. Throughout her internship, Pape conducted comprehensive surveys on fish abundance, reef health and crow-of-thorns starfish. She also planted corals and participated in initiatives to reduce plastic pollution.

About Faith Pape's Internship

Faith Pape encounters marine wildlife while diving in Thailand, part of her extensive work on marine ecosystem health and protection.