Who likes flounders and solefish? I do. They are crazy looking fish. Having both eyes on one side of your body is insane. The weird thing is that they are born normal looking and than get more and more deformed as they get older. They also don't really like to swim, most the time they simply crawl around on their side (right or left depending of specie).
I found some Japanese illustrations of the most common fresh water flat fish. Surprisingly they are pretty accurate when compared to the actual pictures.
Flatfish Life Cycle (apparently most solefish speak Japanese)
Achirus sp. (South American Fresh Water Sole)
Cynoglossus sp. (these are Asian species)
Hypoclinemus mentalis (South America)
Brachirus sp. or Euryglossa sp. (Asia)
Brachirus harmandi (Euryglossa harmandi)
Some unknown fresh water soles:
Ok. I know they are not freshwater, but Alaskan halibut (Hippoglossus hippoglossus) are cool. Just look how huge they can get. It is a shame we don't see them in public aquariums much