A Life Illuminated Review: See the Ocean’s Depths in a New Light

A Life Illuminated 
(USA, 89 min.)
Dir. Tasha Van Zandt
Programme: TIFF Docs (World premiere)

 

It’s a testament to the best of documentaries when they transport audiences to uncharted waters. However, the case is doubly impressive for A Life Illuminated, which brings viewers to new depths both literally and figuratively. This outstanding underwater adventure follows in the great tradition of films like Le monde de silence by venturing into the depths of the ocean with a great mind who pioneered exploration of the vast world beneath the oceans’ surface.

Director Tasha Van Zandt gives an appropriately transporting portrait of marine biologist Dr. Edie Widder. The scientist’s story tells of a life in which she refused to be a fish out of water in a male-dominated field. Her groundbreaking research in bioluminescence—a phenomenon in which underwater creatures communicate by transmitting light via chemical reaction—proves perfectly suited to the cinema, too, as the parallels in her advances in the field develop in tandem with innovations in cinematographic technology that help capture the ocean anew. A Life Illuminated beautifully shares Dr. Widder’s passion by inviting audiences along for the thrilling experience that fuels her.

The film serves as a notably feminist tribute to Dr. Widder as she does for marine life what Jane Goodall did for primates. Van Zandt features a candid interview with Dr. Widder that serves as the spine of the film. The scientist proves a very animated speaker and her colourful vernacular ensures that the science within A Life Illuminated is clear and accessible. That’s the product of the work that Dr. Widder’s been doing her entire adult life: furthering a field, a quest for knowledge, and an understanding of our planet far beyond the academic community. 

Her story also has a great philosophy behind it, something of a Gulliver’s Travels in terms of exploration. While she understands the benefits of space exploration, for example, Dr. Widder expresses frustration that research for terrains far beyond our planet receive comparatively exceptional funding, while marine biologists like herself fight for grants when oceans cover 70% of the Earth. And the percentage of that field that’s actually been explored barely goes beyond the surface.

A Life Illuminated builds a rousing story of persevering in the face of adversity as Dr. Widder uses the old boys’ club’s disbelief in her research to disprove them. She recalls with animated detail the literal flash of insight she received when she caught a large eel in a net crawling for specimens and then discovered bioluminescence when the creature flashed her in the lab. Her research poses a significant rejoinder to the old-school (re: patriarchal) methods for researching marine life too. The nets that catch specimens, she notes, often kill them. That tragedy means that researchers can only study goopy gelatinous remains salvaged from the net, or take marine lives in the process of using them to better understand the environment we share.

Dr. Widder’s tenacity fuels another thread of the story that deals with the submarine contraptions with which she does her deep dives. Even though Dr. Widder tells her stories in retrospect, archival footage of the scientist going far underwater, and seeing water leak into her vessel, proves consistently heart-pounding. But even in the face of failure and embarrassment—often in the public eye—her message offers an inspiring message about pursuing one’s passion without regret for failure. She makes clear that failure simply presents a learning opportunity to improve.

And improve she does, and all these failures, trials, tribulations, and deep dives build towards a thrilling final act. Thanks to the developments in film technology, Dr. Widder and her crew dive to the deepest part of the ocean and seek to communicate with marine life through bioluminescence. Shot in exquisite 4K, which truly demands the big screen experience, A Life Illuminated takes audiences to profound depths of human discovery as Dr. Widder lets us experience the world anew through her research. Magical, if not genuinely awesome, footage of marine life shows a diversity of animals communicating by radiating different colours, palettes, and patterns. The real money shot here, though, comes when the team communicates with a giant squid. A Life Illuminated shares some unprecedented images of a giant squid in action, brought to life by bioluminescence and the scientists who refused to quit before getting that one perfect shot.

To see the squid in all its gargantuan wonder—it’s beautiful for such an ugly creature—one can’t help but to inspire a sense of awe. This spectacular adventure reminds one of how small we are in the ocean of life, and all we can do is marvel at the complexity of the world before our eyes. 

A Life Illuminated screens at TIFF 2025.

Read more in our interview with Dr. Widder and Van Zandt.

Get more coverage from this year’s festival here.

 

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