About the film
The Loneliest Whale: The Search for 52 is a 2021 American documentary film, directed, written, and produced by Joshua Zeman. Leonardo DiCaprio and Adrian Grenier serve as executive producers. The film follows a group of scientists in search of the 52-hertz whale, a whale which is believed to have spent its life in solitude, calling out at a frequency different from any other whale.
It was commercially released in theaters and on video on demand by Bleecker Street on July 9, 2021.
From the film's Wikipedia article (CC BY-SA 4.0).