Not Cubans.
Here are Cubans
my first impression was an older male Hypsophrys nicaruaguense,especially in pics 3 & 4, but the mid body blotches are off
below a pic of Gymnogeophagus balzanu to compare, since it ws suggested again the mid body blotch isn't right
But these days with all the random hybridization, its really just a krapp shoot
here is a Vieja breidhori to compare
or maybe closer Chuco intermedia
I tried to get your pic a little closer up