Very nice mate.
Would like a group of robertsoni one day.
The rostratus looks good too.
First is my old robertsoni. Still showing a lot of blue, but not as much as when she was younger. She is 10".
Second is my rostratus. I haven't vented, so I don't know the actual sex. This fish is around 8".
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In first pic. Has your Robert ever suffered a eye injury, or is that camera angle?