The above achievement is broken on PC. It says "Caught one of each species in Le Lac d'Or" I have caught roach , tench , bream , common carp , mirror carp, koi carp , ghost carp and catfish and it doesn't unlock. So either it's broken or there is some other rare species I don't know about ? Or is the description wrong that it must be one boss fish of each species , and not just one of each species ?
I think this one is buggy to be honest. I unlocked it after catching all species of Crap, Catfish and Roach. I hadn't caught any Bream when it unlocked for me.
The achievement should have unlocked for you Wikus. The reports we have had on this achievement are that it unlocks too early rather than not at all.