If you knew the number of times I have argued with fish store owners about mislabeled fish...I don't have a degree in biology or ichthyology, but I do know something about Amazonian fish and even when I have taken photos with me I feel like that former actor fellow Rodney--I get no respect

.
Anyway, I must say the fish store is in this case incorrect in labeling this fish a
Bolivian Ram. In my humble opinion, this is a
Mikrogeophagus ramirezi, and quite possibly the wild form if it is as they claim wild-caught. The fish is still a bit pale but as it settles in and colours up there will be more blue in the individual scales on the side of the fish--though not to the extent of the hybrid "
Blue Ram" that the hobby developed from wild fish. There are no distinct blue scales on M. altispinosus, just a pale bluish sheen in the fins and the gray body colouration.
A caution though, if this is indeed a wild-caught M. ramirezi, it will require very specific water.
Byron.