The Underwater Jungle (2025): cast, story & where to watch

Released in 2025, The Underwater Jungle is a documentary film directed by Zoltán Fehér, running about 74 minutes.

What it’s about. In West Hungary, north of Lake Balaton, we find a lake that is completely unique. The world's largest biologically active, medicinal thermal lake, Lake Hévíz. Its name is familiar to many people, both in Hungary and internationally. Its gentle, warm waters are used for medicinal treatments, and the spa is open to visitors all year round. But Lake Hévíz also has a hidden world. Today, this is the setting for a strange but completely unsuspected ecological experiment. Both the lake and the outflow channel, known as the Hévíz Stream, have become home to tropical fish species. Hidden among the Indian water lilies, Central American cichlids, known from pet shops, live their daily lives. Huge swarms of firehead cichlids forage on the bottom, jewel cichlids protect their young in the cover of aquatic plants, and predatory jaguar cichlids hunt unsuspecting small fish. But how did this diverse yet alien community come to be? And what are the consequences of their presence for native wildlife?

Who’s in it. The Underwater Jungle stars Attila Dolmány as Narrator.

How it landed. With an audience score of 9.0/10, The Underwater Jungle sits among the best-reviewed titles in the catalogue.

Where to watch. Streaming options change often. See the full, country-by-country breakdown on our where to watch The Underwater Jungle page.

If you liked it. Fans of The Underwater Jungle tend to enjoy One Direction: This Is Us, Burn the Stage: The Movie, BTS World Tour: Love Yourself - Japan Edition and Senna.