The only information I have on them is that my father bought them quite a few years ago when he was in China. I'm guessing they are freshwater but I really have no idea. Any help would be appreciated. Pictures below
http://i.imgur.com/XeQMq.jpg
http://i.imgur.com/UtYQL.jpg
http://i.imgur.com/XeQMq.jpg
http://i.imgur.com/UtYQL.jpg