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Unfortunately, we know almost nothing about the blue-dorsal-finned Pelvicachromis and can't say that this form corresponds to Pelvicachromis roloffi. I was first made aware of this form when Oliver Lucanus showed me a photo at the American Cichlid Association convention this past July 2004. The fish in question supposedly came in with a shipment from Guinea but, unlike the other fishes coming out of that country, was not collected from the Kolente system. The image depicted a Pelvicachromis species female that exhibited a distinct iridescent turquoise-blue bar on the dorsal fin. Shortly thereafter, Toyin Ojo advised me that this form came in as a contaminent with one of his shipments from Guinea as well. As far as I know, they've only just entered US, in quantity, for the first time this month (Jan. 2005).
Oliver Lucanus forwarded preserved specimens to Anton Lamboj this past summer. We wait with baited breath for Dr. Lamboj's analysis.
Should you find out anything more, please post it here.
Dr. Lamboj and I have been discussing this fish a bit. He is suggesting that it is at the least a different Plevicachromis species, and possibly a new genus.
With photos courtesy of Ariel Bornstein and a little more information courtesy of Steve White in hand, apistogramma.com is pleased to offer our users a profile of 'Pelvicachromis' sp. "Blue Fin" in the species profiles section.