FW Flounder ID...No it is not a Hogchoker

[shipmonkey]

I picked up a few of these at a lfs in Sacramento. They have doing great in my tanks for several months, but I have no idea what type of flounder they are. They are clearly not the standard Florida hogchoker that normally gets passed off as a freshwater flounder. Any ideas?

 

[MN_Rebel]

Tonguefish not sure what is exact species. Possible a freshwater or a river tonguefish.

 

[spotfin]

Sole. Hard to tell what species. Eyes are on the right side.