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Thinking Outside the Tank! - The Intelligence of Fish

July 9, 2025

Are fish really dumb, mute and unable to feel anything? Or is that just what people think?

Thinking Outside the Tank! - The Intelligence of Fish
Image: Arte France

In recent years, scientists have been discovering more and more about the characteristics and abilities of these aquatic creatures.

Image: Arte France

Fish are generally regarded as mute, expressionless creatures without memory, feelings or even a sense of pain. In reality, however, they apparently have a lively social life, great adaptability and genuine emotions.  ‘Fish - Smarter Than We Thought?’ is a humorous and educational journey of discovery through the wondrous world of water, from the goldfish bowl in the living room to exotic coral reefs and the turquoise lagoons of Moorea, an island in French Polynesia. The documentary also scrutinizes the relationship humans have with animals’ intelligence, in general.

Image: Arte France

Accompanied by goldfish Maurice, the film takes a deep dive into the colorful underwater world and explores what forms of intelligence may be hidden behind fins, scales and gills. From the smallest stream to the largest ocean, in aquariums and laboratories around the world, scientists are proving that fish are anything but limited.

Image: Arte France

For several years, researchers have been trying to understand what goes on in the minds of aquatic creatures. And the latest discoveries exceed all expectations. The documentary presents these astonishing findings and illustrates how fish perceive the world, communicate with each other and interact with their environment.

Image: Arte France

What does goldfish Maurice see? How does he react to touch? Does he have a sense of smell? Is he able to adapt to his environment, use tools and perhaps even feel emotions? Scientists in Portugal, Polynesia, Britain and Corsica provide answers to these exciting questions. The documentary's animal protagonists include the empathetic zebrafish, the cichlid that fulfils its marital duties, the cleaner wrasse that recognizes itself in the mirror, the goldfish that can remember complex sequences for months and classify pieces of music according to genre, and the clever archerfish that can distinguish around 40 human faces. Who can doubt the intelligence of these fish? 
 

Broadcasting Hours: 

DW English

TUE 22.07.2025 – 01:15 UTC
TUE 22.07.2025 – 04:15 UTC
WED 23.07.2025 – 09:15 UTC
WED 23.07.2025 – 16:15 UTC
WED 23.07.2025 – 21:15 UTC
THU 24.07.2025 – 12:15 UTC
SAT 26.07.2025 – 08:15 UTC
SUN 27.07.2025 – 13:15 UTC

Lagos UTC +1 | Cape Town UTC +2 | Nairobi UTC +3
Delhi UTC +5,5 | Bangkok UTC +7 | Hong Kong UTC +8
London UTC +1 | Berlin UTC +2 | Moscow UTC +3
San Francisco UTC -7 | Edmonton UTC -6 | New York UTC -4

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