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Jack Dempsey

Metalhead88

Fishaholic
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That's a female.

Females have more spangles around the lower section of their gills like the fish shown. This is by far the best way to sex a jack dempsey.

Males have no spangles in that area and usually have more spangles throughout their body.

The pointed dorsal fin (although true that males generally have a more pointed one) is a poor indication of sexing. It just isn't a sure fire way to tell.
 
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