When they're mature, it is very obvious; males develop huge nuchal humps atop their foreheads, while females have little or no hump. However, as juveniles, there is no reliable way to sex them. Pellets are a good staple. If you want to improve growth and color, live and frozen foods, like crickets, earthworms, bloodworms, mysis, and the like are good choices.
We can know a flower horn whether it is male or female by looking at its face if its sharp its female and if its short its male
Males are exceptionally brightly colored and display a lump above their head (only in mature males), sometimes the lump is greatly exaggerated in size which makes the fish highly prized by collectors and breeders.
When they're mature, it is very obvious; males develop huge nuchal humps atop their foreheads, while females have little or no hump. However, as juveniles, there is no reliable way to sex them. Pellets are a good staple. If you want to improve growth and color, live and frozen foods, like crickets, earthworms, bloodworms, mysis, and the like are good choices.
According to their age development, you can know a little better
1- 2 months(1mm - 30mm)
. Juvenile stage.. Colors and body patterns are not noticeable.
. No known method. . Observations shows larger sized fish within the same batch tend to be males.
2- 5 months( 30 mm - 150 mm)
. Colors and body patterns are becoming more distinctive. . Distinctive black marking on the dorsal fin indicates that it is a female. However, this is not foolproof. The same pattern does exist on some male Flowerhorns.. Observations on the shape of the genital papillae. V-shaped papilla indicates a male fish, while a U-shaped papilla indicates a female fish. Gently squeezing the abdominal region may reveal the papillae.. Male Flowerhorns will have broader body with higher dorsal, anal and caudal fins. It is also observed that male Flowerhorns will have thicker jawline and more distinctive body color.
3- 5 months and above(150 mm - 600 mm)
. Flowerhorns begin to mature. Distinctive and rather prominent head humps are visible on the male fish. .Female will start to lay eggs even without the presence of a male
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Adult male flowerhorns have a large nuchal hump (the forhead hump), are brightly colored, and are very broad and they are v shape . Females have a much smaller or absent hump, are less colorful, and are smaller andthey are u shaped