No, not this show, but also European TV channels show various documentary, scientific and similar films about nature and plants, wildlife, domestic animals, ecology, etc.
This fish is a giant goliath tigerfish, found probably in a tropical African river, like the Congo, for instance:
https://en.wikipedia.org/wiki/Hydrocynus_goliath
Other large and giant freshwater fishes like arapaima, alligator gar, various catfish, sturgeon, pike, salmon, giant "lamprey", piranha species, etc., are more or less often shown or referred to, including some more or less fantastic stories about pacus and other weird creatures.