Rather hard to get a decent photo!!... Male or female??
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As previously stated, the only 100% way of sexing a live Angelfish is when they are spawning however, there are "tells" that help guessing be more accurate. Your fish appears to be a male based on the angle of the anal fin and what appears to be the beginning of the head hump. I want to emphasize again that this is only a guess but one based on years of breeding these fish. With today's domesticated strains, there are fish that show the opposite gender's traits. I once saw a beautiful Male Marble ( based on head hump and body shape) in a pet shop display tank and I approached the owner about buying it to go with my female marble. He informed me that he was looking for a male as well to go with HER because her mate recently died and she was laying hundreds of eggs almost every 7-10 days. So you see, there are no guarantees based on a picture.