The public aquarium in Valencia had some big Hydrolycus sp.. It could be there, although from the view in the picture, it looks like a newer ,more modern aquarium. If I had to bet, I'd say it's in a larger South American city. The woman and the children in the picture have a dark complexion, like they may be from Central or South America. That could also be purely a coincidence. They may be from somewhere else thousands of miles away and could just be tourists at that aquarium. I'll ask some buddies at the public aquarium here in town to see if they know where that picture might have been taken.