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Jonathan Cohen

Assistant Professor

  • Office: 210 Cannon Lab
  • 1-302-645-4298

eyes_main page


  • B.S., magna cum laude, Biology & Environmental Science, Dickinson College, 1999
  • Ph.D., Biology, Duke University, 2004
  • Postdoctoral Fellow, Harbor Branch Oceanographic Institution, 2005-2006

Research Interests

Comparative physiology and behavior of marine animals; Neurobiology; Sensory systems; Vision; Zooplankton ecology; Deep-sea biology; Pelagic ecology; Polar biology

Current Lab Members

Corie Charpentier (PhD student), Heather Cronin (MS student), Adam Wickline (MS student), Hayley DeMarchis (undergraduate), Patrick Duffy (undergraduate)




Recent Lab News

Jon is currently on Svalbard conducting research into light and vision in the polar night. Learn more at the UDaily series "A Tale of Two Poles" and in The News Journal.

Our DSG ZooScan project was featured in UDaily, WDDE radio, The Coast Press, and The News Journal (with Adam on the front page!).

Jon participated in a symposium on Polar Night biology at the Arctic Change 2014 meeting in Canada.  More details on this and other presentations can be found on the Mare Incognitum website. 

Our DSG ZooScan project was featured in the Environmental Monitor.

EPSCOR Summer Scholar and UD senior Hayley DeMarchis won an EPSCOR science ethics essay contest.  Congratulations, Hayley!

Former UDRF REU student and UD Junior Alex Wright was selected as a NOAA Hollings Scholar for 2014-2016.  Congratulations, Alex!

See the blog from a research training cruise in June 2014 that traveled from Barbados to Bermuda.

Automated optical analysis of zooplankton

ZooScan image of mysid from Delaware Bay

Sensory biology in the plankton

Adult mud crab with eggs ready to hatch

Pelagic ecology in the high Arctic winter

Graduate student Heather Cronin in Svalbard

Courses taught by Jon Cohen
Students with trawl

Students with tucker trawl cod end.

Journal of Comparative Physiology A

Amphipods living on beaches use polarized light and light/dark objects to aid in their daily orientation tasks

Journal of Experimental Biology

Pupils in the eyes of the estuarine squid Loliguncula brevis have a structure and function that facilitates vision in the water column


• Marine Ecology• Molecular Ecology• Ocean Observation• Physiological Ecology


CEOE School & Departments

School of Marine Science & Policy

Advancing the understanding, stewardship, and conservation of estuarine, coastal, and ocean environments.

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Department of Geological Sciences

Discovering how geological processes have operated over various time scales to create and influence the planet’s surface environments.

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Department of Geography

Investigating the interactions between people and the environment and the processes that explain the location of human and natural phenomena.

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College of Earth, Ocean, and Environment • 111 Robinson Hall • Newark, DE 19716 • USA
Phone: 302-831-2841 • E-mail: ceoe-info@udel.edu

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