It may while still small, but be warned Amphilophus don't play well with others. I tried Swordtails when I mine were young they didn't last two weeks.
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Later when Casper was bigger I tried Spannar barbs and he ate 4/6 overnight. View attachment 1446566











So just guessing here, behavior plays as much a role in telling them apart as looks does.
As in this pic, a male is gill flaring at a young Casper for possession of the turf and or female near him.
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So always going left to right
Pic 1 F-- M-- F-- M-- M
Pic 2 M-- M-- M-- F no guess on fish behind fish 3
Pic 3 F-- M-- M-- M
Pic 4 M--M
Pic 3 you can really see the difference in the stubby faced female and the 3 males
To me it's opposite of what you guessed.Any thoughts on the sex of the most recent pictures I posted?


I see what you mean. So going off of that, this big guy has the look of a male right?To me it's opposite of what you guessed.
Young females forehead is almost a flat line from dorsal fin to mouth.
View attachment 1450136
Here is my Casper and Goldie Hawn.
If you look at the forehead area of both. In the female it's nearly flat from dorsal to her mouth. In the male you see a definite notch in the forehead near the eyes.
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Another young male, notice the definite notch.

Yes to me the left one looks male. Right one female.I see what you mean. So going off of that, this big guy has the look of a male right?
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