Hello guest! Are you an Apistogramma enthusiast? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Apisto enthusiasts to meet online. Once you join you'll be able to post messages, upload pictures of your fish and tanks and have a great time with other Apisto enthusiasts. Sign up today!
Maybe, but it is rather deep-bodied/high-backed for this species. Maybe it is only obese. Like your 'Algodon II', there are not enough diagnostic dark markings that show for a positive identification. Do you have photos of the female?
No, neither A. staecki nor A. cf. staecki (Guaporé) have round caudal fins when fully mature. Both develop a truncate/squared-off posterior edge with short top and bottom tips on males. The more I look at your fish, I wonder if it is a steindachneri group species. It would help if you can get a photo that shows the dark markings. Catch the fish in a net and press the net against the tank glass. That should frighten the fish enough for it to show its dark markings.