This is a video of European sturgeons in the Paris aquarium.
From Wildlife Extra:
Fisherman catches Europe’s rarest fish
February 2007. On the 12th of February 2007 MUMM received a telephone call from the Flemish Sea Fisheries Administration: ‘A fishermen has caught a sturgeon off the Belgian coast, and has landed it alive at Nieuwpoort’.
The animal had a French tag.
Scientists of the RBINS who went to the fishing port immediately suspected it could concern a European Atlantic sturgeon Acipenser sturio, and contacted the French institute dealing with the protection of the last specimens of this highly endangered species.
The suspicion became true fast: this fish had been tagged in the French Gironde estuary on the 27th of August 1996, and until the 12th February 2007 this animal had not been seen.
At the time of the tagging it measured 57cms, now more than 1,5m.
The European Atlantic sturgeon can grow to 3,5 meters and as such is the largest fish to be found in Europe’s rivers.
It lives in estuaries and shallow parts of the Atlantic Ocean and the North Sea, and in the past reproduced in all major European river systems.
Due to overfishing, river pollution and river construction works, it has all but disappeared.
The last place on earth where it reproduced in the recent past is the Garonne and Dordogne River system, flowing together in the estuary of the Gironde (France), but also there the species just clings on.
The last reproduction was observed in 1995, and the animal caught off the Belgian coast is presumed to be one of the animals born then.
The hope of saving the species from extinction lies upon a hundred animals, still juveniles, in captivity in two breeding centres in France and Germany.
It is hoped these animals will reproduce in a couple of years time (sturgeons only reproduce when 12 to 15 years old). …
The animal that was caught on 12 February was released at Nieuwpoort shortly after the catch.
We hope the animal will once return to the Gironde to reproduce.
In Roman times, sturgeon were often eaten in The Netherlands.
A three-year quest to find the giant Chinese paddlefish in the Yangtze river failed to sight or catch a single individual: here.
The Yangtze River may have lost another inhabitant: the Chinese paddlefish: here.