Thanks for your replies!
Hi David,
I dont believe that this is C. taenia, the nearly solid line over the blotches I have never seen at C. taenia pictures.
At some fishes merge the blotches nearly to a thicker line. You can see what I mean here:
Many thanks for the PDF, much to read
BTW: One female looks very thick...
![Image](http://greygo.net/Aqua-Bilder/lol/Cobitis_sp_4.jpg)
Maybe a normal thick cobitis-female or an "eggs-inside-thick" female? I'm not sure.
Bye,
Thomas