A Film That Makes the Stationary Lives of Oysters Into a Wondrous Tale

To say that “Holding Back the Tide” is about oysters is technically true. But that description might give the impression of a more conventional nature documentary, the kind with stunning footage narrated in the sonorous voice of a British man. I mean no slight to those films, which are often incredible. But “Holding Back the Tide” (at the Firehouse theater in New York) is something entirely different, and it’s wonderful.

The director, Emily Packer, faced an inherent challenge in making a film about oysters, which is that you can’t really observe them doing anything, the way you might with lions or whales. They’re stationary. They don’t have facial expressions. They don’t make noise. But oysters are also incredibly important to our environment, especially in regions like New York City, where eroding shorelines pose a real threat not just to the natural world but to the city’s human inhabitants, too. Oysters also help improve water quality. And, at least to some of us, they’re pretty delicious.

All of these facts come up in “Holding Back the Tide.” In interviews and a number of observational scenes, we meet the people and organizations who work to restore the oyster population in the New York region, including the Billion Oyster Project, which among other things partners with top restaurants on shell collection and education. We learn that without oysters, the city might not have existed, at least not the way we imagine it. We find out about historical figures and fascinating biological details. But the factual documentation scenes are just one mode that the film operates in.

That’s because Packer sees more in an oyster than just a beach defender or a tasty snack. It’s both a literal creature and a rich symbol for thinking about civilization. Oysters are ancient. They’ve seen a lot. Their history is tied up with the history of race and labor; their disappearance from some areas tells a story about pollution and environmental decay. And oysters can change gender during their lives, with most starting out as male and transitioning to female after the first year of life, which gives them the capacity to fertilize their own eggs.