They may look like rio metas but that's just a guess. You can only know for sure if you have documentation so personally I wouldn't go around telling people they are rio metas bc that's what people feel they look like. Besides the rio negro orinos most are impossible to identify their collection point. Do you know if they are wild caught or did someone just pick them up in as orinos? Chances are they may be captive bred. There's a lot of them out there. If you told me they were purchased from Jeff rapps then they may be wild caught and more possible, rio metas. With that a side they are nice Orion's regardless of what ever they are.