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Studies & Degrees in Hydrobiology

Hydrobiology is the branch of biology that studies life in water: the organisms that live in lakes, rivers, wetlands and seas, how they function, and how they interact with their environment. It draws on ecology, taxonomy, physiology and chemistry. The freshwater side of the field is often called limnology and is usually divided into the ecology of flowing waters (rivers and streams) and of standing waters (lakes and ponds); the marine side overlaps with biological oceanography. Universities today rarely use the name hydrobiology for a degree. The subject is taught under titles such as aquatic sciences, aquatic environmental science, marine biology or oceanography.

Students learn to identify aquatic species, to measure the physical and chemical properties of water, to design field and laboratory experiments and to analyse large data sets. Much of the work is applied: water quality, fisheries, the effects of human activity and climate change on aquatic ecosystems, and the restoration of damaged waters.

Qualifications and levels

Hydrobiology is mainly a specialisation at master's and doctoral level, built on a bachelor's degree in biology or environmental science.

  • Bachelor's level: students usually take a general biology degree and choose aquatic electives. At Florida State University, for example, biological science majors can concentrate their electives in academic tracks such as Marine Biology or Ecology, Evolution, and Environmental Science; the tracks are guidance and not separate majors.
  • Master's level: the Master's Degree Programme in Aquatic Sciences at the University of Jyväskylä is a two-year, full-time programme of 120 ECTS credits that leads to a Master of Science degree. At Florida State University, the Aquatic Environmental Science (AQES) programme offers a thesis master's for science graduates, a non-thesis track for working professionals and science graduates, and a Professional Science Master's with a capstone project or internship. The minimum course requirement for the M.S. in oceanography is 33 semester hours.
  • Doctorate: Florida State University offers the Ph.D. in oceanography with tracks in biological, chemical and physical oceanography; all doctoral students take 24 semester hours of dissertation. The Jyväskylä master's qualifies for advanced studies in biological or environmental science.

Where to study it

SpainExchange lists two active schools for hydrobiology, one in Finland and one in the United States.

The University of Jyväskylä (JYU), in Finland, focuses on inland waters. Its aquatic sciences programme is taught in English and deals with the environmental and biological processes that determine the characteristics and ecosystem services of lakes and rivers, and with the sustainable use of natural resources. The university is surrounded by lakes, and its Department of Biological and Environmental Science includes the Konnevesi Research Station. Applications are made once a year in January through the Studyinfo.fi portal, the next period being January 2027, and studies begin in August. Applicants need a suitable educational background and proof of English skills. Students from non-EU/EEA countries pay a tuition fee, published as €14,000, and can apply for a scholarship after their first year.

Florida State University (FSU), in Tallahassee, Florida, approaches the field from the sea. Its Department of Earth, Ocean and Atmospheric Science runs the oceanography graduate programme and the AQES programme, and in partnership with the FSU College of Law it offers a joint pathway to earn a J.D. and an M.S. in Oceanography at the same time. Teaching is in English.

Careers

According to the University of Jyväskylä, there is a need for people with extensive training in aquatic science, in work that ranges from species identification and monitoring to restoration, management and modelling. Research is carried out in universities and research institutes, and graduates increasingly work in companies or as entrepreneurs; some continue to a doctorate. In Finland the programme collaborates with state institutes such as the Finnish Environment Institute (SYKE) and the Natural Resources Institute Finland (LUKE), mainly through shared thesis supervision and internship positions. Typical employers elsewhere are similar: environmental and water authorities, fisheries bodies, consultancies and research centres. No official employment statistics are published for hydrobiology as a separate field.

Frequently asked questions

Is hydrobiology the same as marine biology?

Not exactly. Hydrobiology covers life in all waters. Marine biology and biological oceanography deal with the sea, while limnology and programmes such as aquatic sciences at the University of Jyväskylä deal with freshwater systems.

Can I study hydrobiology in English in Europe?

Yes. The Master's Degree Programme in Aquatic Sciences at the University of Jyväskylä is a two-year programme of 120 ECTS credits taught in English.

What do I need to apply for a master's in aquatic sciences?

A suitable bachelor's degree and proof of English skills. At the University of Jyväskylä the application is made in January through Studyinfo.fi, and non-EU/EEA students pay a tuition fee.

Where do hydrobiologists work?

In universities and research institutes, in public environmental and natural-resource bodies and, increasingly, in companies, on tasks such as monitoring, restoration, management and modelling of waters.