These photos are of a newly imported (and never before seen) species of Parananochromis from southern Cameroon - found together with Parananochromis longirostris.
The female shows metallic purple in the dorsal fin (all Parananochromis sp. females show metallic colors in the dorsal fin, except P. longirostris) , as well as some unusual black tips to the pelvic fins.
Special thanks to Anton Lamboj for contibuting this photo.