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They were labelled as A. pertensis so my guess would be that they are A. cf pertensis. I emailed the shop but he had no catch location as they'd come from a wholesaler first. Do they even look like they could be a pair or is the less developed one likely a sub male. The yellower, smaller one doesn;t appear to have black on her pelvic fins, but I don't know whether they do in this group or not.