I agree with you I would not say that they were pure I would point out what they origin is.
I am the same I feel all fish should be properly labeled and that not doing so is what has caused a lot of issues in the hobby, especially with hybrids that don't look much different than one of the parent species.
I am especially interested to see if there is any way to tell a difference between a yellow lab that produces only yellow offspring and one that produces some other color. It is probably not possible but you never know and that is what science is about. This breeding group could provide some very interesting and useful information.
I now have 11 species in my classroom that are being maintained for the CARES program:
P. saulosi, Haplochromis sp. ‘ruby’, Neochromis greenwoodi, Astatotilapia aeneocolor, Aulonocara jacobfreibergi lwanda, Neochromis entebbe, Astatotilapia brownae, Astatotilapia sp. 'thick skin', pseudotropheus demasoni, Xenotoca eiseni, and Pterapogon kauderni (not CARES but endangered anyway and our only marine). I am picking up a 12th species Paralabidochromis chromogynos Zue Island this weekend:)
I am very committed to maintaining proper species lineage. I am hoping to interest my students in doing the same.