Sharp looking fish.
The pulcher group may yet be split into more species. From what I've read both A. pulcher and A. coeruleopunctatus are widely distributed over diverse habitat and both species are known to be diverse
within themselves. An A. coeruleopunctatus in a stream on one side of a mountain can look different from an A. coeruleopunctatus in a stream on the other side of a mountain. Like some other genera with very similar looking species (unless you're counting scales or fin rays, looking at dental differences, breeding differences, etc.) as well as geographical variation
within species, the result can be wrong guesses at IDs or mistakenly suggesting a specimen is a hybrid based on color, fin markings, etc. that look different from type photos or "
look different from from the ones I had." Imo another overlooked factor in attempting to distinguish some very similar looking species based on online photos is how much markings or color can overlap between populations of very similar species or change according to lighting, substrate, mood, etc. In a few cases, now that I know more about them, I'm less sure now about certain species I thought I could identify fairly easily a few years ago.
Never mind the hobby experts, even the real experts get fooled. I forget the species and would have to search again for the paper, but even Ad Konings has been fooled, at one point identifying an Aulonocara in two locations as the same species based on color and markings that turned out to be two different species when more closely examined.
Regarding A. coeruleopunctatus:
https://pubmed.ncbi.nlm.nih.gov/23008800/
Here, we test the hypothesis that due to their relatively greater dispersal capabilities, the neotropical cichlid species Andinoacara coeruleopunctatus will display a phylogeographic pattern that differs from previously described biogeographic assemblages in this important region. Based on an analysis of 318 individuals using mtDNA ATPase 6/8 sequence and restriction fragment length polymorphism data, we found eight distinct clades that are closely associated with biogeographic patterns.