FORT PIERCE / OCEAN SCIENCE / INSPIRATION
Edith Widder
Learning to see
in the dark.
By Rob Urban
The trouble with looking for life in the deep ocean is that your equipment can announce your arrival before you see anything. Bright lights, noisy machinery, and a large unfamiliar object moving through the water are fairly strong reasons for an animal to leave.
Edith Widder took that problem seriously. The marine biologist and inventor helped develop ways to observe animals with less disturbance, using what she knew about the light they produce and perceive. Her work has helped bring extraordinary creatures into view, including the giant squid. It has also connected deep-sea exploration to the protection of waters much closer to her Florida home.
The MacArthur Foundation’s account of her career, published when she received a fellowship in 2006, describes a scientist who worked with engineers to create instruments for measuring and observing bioluminescence. She had led bioluminescence research at Harbor Branch Oceanographic Institution in Fort Pierce before cofounding the Ocean Research and Conservation Association in 2005.
There is a particularly appealing kind of curiosity at work here. Widder wanted to understand an unfamiliar world, and she was willing to question whether the usual way of entering it was preventing her from doing so.
An ocean
of signals.
Bioluminescence is light produced by living organisms. In the deep sea, that light can serve many purposes. Widder’s account of a 2019 expedition describes animals equipped with glowing lures, light used in camouflage, and defenses that include releasing luminous material toward a predator. Some light organs still have functions researchers do not understand.
On that expedition, the Medusa camera system recorded fish and large shrimp investigating an electronic lure far below the sunlit surface. A shrimp that bumped the equipment released bioluminescence as it escaped. These were behaviors unfolding in the animals’ environment, captured without bringing the creatures into a laboratory.
Learning what an animal looks like is one task. Learning what it does when another creature approaches, or when something unfamiliar flashes nearby, requires a different kind of observation. Widder’s inventions help make that observation possible.
Build for the eyes
that live there.
Her technical explanation of Medusa is wonderfully concrete. The system uses red light that most deep-sea animals cannot see and operates without noisy thrusters. Its electronic jellyfish imitates the flashing display of a real jellyfish. That display is thought to summon a larger predator when the jellyfish is under attack, potentially giving it a chance to escape.
The imitation gave researchers a way to attract attention within the camera’s view. During the 2012 giant-squid expedition off Japan, the lure helped produce three sightings in one deployment. Knowledge of a small animal’s defense had become part of the search for a very large one.
I like an invention whose logic requires understanding the creature first. The equipment is impressive, but the biological question is doing the steering.
The footage survived
the lightning.
The 2019 expedition brought another extraordinary encounter. In a mission log coauthored with Sönke Johnsen, Widder recounts Nathan Robinson reviewing footage from Medusa and spotting a large animal approaching the lure. The team consulted identification references, then sought the judgment of squid specialist Michael Vecchione. Their excitement was already there. The identification still needed checking.
The day acquired an almost unreasonable amount of drama. A lightning strike hit the ship shortly after the discovery, and a waterspout formed nearby. The computer containing the footage survived. Once communications returned, the team sent the video for expert review. Vecchione judged it almost certainly a giant squid. After the review, celebration and dinner, they deployed the equipment again.
That final detail is lovely. The remarkable moment did not remove the need to put the camera back in the water.
Twenty-three
people.
One small ship.
Johnsen’s closing account of the expedition supplies the wider picture: 23 people sharing a small ship, long hours, limited privacy, and responsibilities that depended on one another. Launching equipment required coordinated work across the vessel. Holding a line safely could matter as much in that moment as identifying an animal later.
Engineers, pilots, crew members, and fellow researchers help make the observations possible. The footage comes home because a team can keep working together offshore.
It is easy to attach a discovery to the name we recognize. Johnsen’s account makes me appreciate the less memorable work that lets a discovery happen at all. Someone has to manage the line. Someone has to look through another batch of footage. Each person’s care makes the others’ work possible.
The value of seeing.
In her 2021 Yale Environment 360 interview, Widder described temporarily losing her sight after a medical crisis in college. The experience made vision precious to her and informed how she thought about animals living amid darkness and occasional flashes of light. She did not describe the ocean as empty darkness. Her first deep dive had revealed far more light-producing life than she expected.
That ability to carry an experience into a question, then build a way to investigate it, gives her career its particular character. There is wonder in the work, but also a great deal of patient design.
Under familiar water.
Widder has also turned her attention toward the Indian River Lagoon. In a 2021 interview with Yale Environment 360, she discussed ORCA’s work on water-quality monitoring, pollution maps, and testing fish for contaminants. The interview connects her concern for a Florida estuary with her concern for less visible marine habitats.
A creature hidden in the deep and a pollutant hidden in familiar water present very different scientific problems. Both can escape our attention because the surface gives so little away. Widder’s work makes me less willing to mistake an attractive view for a complete picture of what is happening underneath it.
Florida has room for both Widder’s instruments and Cynthia Barnett’s reporting. One helps reveal what is happening underwater; the other follows water through the decisions and stories of people on land. Their work gives us more to notice in a place we may think we already know.
Tasha Van Zandt’s documentary A Life Illuminated brings Widder’s continuing exploration to another audience, with theatrical screenings listed in 2026. The film’s published synopsis centers on her pursuit of bioluminescent life and the questions that keep drawing her deeper.
What I admire is the care she takes with the act of looking itself. Widder has helped people see animals that once lived chiefly in our imaginations. She has done it by paying careful attention to the animals’ world, including the possibility that we were making too much noise to see it clearly.
About Edith Widder’s work
Who is Edith Widder?
Edith Widder is a marine biologist and inventor known for studying bioluminescence and developing instruments to observe deep-sea life. She co-founded the Ocean Research and Conservation Association in 2005 and received a MacArthur Fellowship in 2006.
How does the Medusa camera system work?
Medusa uses red light that most deep-sea animals cannot see and operates without noisy thrusters. Its electronic jellyfish lure imitates a bioluminescent display to attract animals into view.
What is A Life Illuminated?
A Life Illuminated is a documentary directed by Tasha Van Zandt about Edith Widder’s exploration of bioluminescent life. Its official website lists theatrical screenings in 2026.
Sources: NOAA expedition accounts and technical explanations, the MacArthur Foundation, Yale Environment 360 and the official A Life Illuminated website. Reviewed September 2026. Reflections are Rob Urban’s; this is not an interview with Dr. Widder.
I’m interested in work that helps people notice more. For more of my writing, or a conversation about making your own work better understood, meet Rob.