Using bone fragments found at archaeological sites, researchers from the Royal Belgian Institute of Natural Sciences have reconstructed the occurrence of sturgeon in the North Sea during the last 7.000 years. It appears that an unexpected sturgeon species was dominant in our region.

Palaeontologists have found 360 million year old placoderms, the oldest known jawed vertebrates, in the quarry of Strud, close to Namur. They mostly found young animals, which could be an indication that it was a nursery or spawning place.