Male and female gourami fish have several physical differences. Male gouramis are smaller and slimmer than females, with a pointed dorsal fin, while females have a rounded belly and a short, rounded dorsal fin. Male gouramis also tend to be brighter in colour, and their genital organ is located at the base of their tails. Behaviourally, male gouramis are more aggressive, especially towards other males, and they build bubble nests for mating purposes.
What You'll Learn
Male gouramis are smaller and slimmer than females
Male gourami fish are smaller and slimmer than their female counterparts. Male gouramis are around 3 inches long, while females can grow up to 3.5 inches. Male gouramis have slimmer, more angular bodies, while females have rounder bodies and bellies. This difference is more apparent when the fish are viewed from the side and when they are breeding, as females tend to swell with eggs.
The dorsal fin is another distinguishing feature between male and female gouramis. Male gouramis have longer dorsal fins that come to a point, while female gouramis have shorter, rounded dorsal fins. The dorsal fin of a female gourami is rounded, making it look smaller and more subtle compared to the male's fin.
While male gouramis tend to be brighter in colour, exhibiting flashier and bolder colours, female gouramis are duller in comparison, with silver or grey hues. Male gouramis also tend to be more aggressive, especially towards other male gouramis. They are ready to fight and will display violent behaviour at times. In contrast, female gouramis are more peaceful and docile.
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Females have rounded bellies
Female gourami fish tend to have rounder bodies than their male counterparts. Specifically, female gouramis have round bellies that will likely stick out, making it easier to identify a specific fish as female. This difference in body shape is most visible when the fish are viewed from the side. When conditioned for breeding, this difference becomes even more apparent, as female gouramis tend to swell with eggs, resulting in even rounder bellies.
The dorsal fin is another distinguishing feature between male and female gouramis. Male gouramis typically have longer dorsal fins that come to a point, while female gouramis have shorter and more rounded dorsal fins. This difference in fin shape is one of the most telling signs for differentiating between the sexes.
In terms of size, male gouramis are usually slightly smaller than female gouramis. However, it is important to note that this difference in size may not always be apparent, especially if the fish are of different ages or have had varying levels of care.
Female gouramis also exhibit different behaviours compared to male gouramis. They are generally less aggressive and more peaceful. During the mating season, female gouramis may flare out their dorsal fins to appear larger when they feel threatened or are defending their eggs.
Overall, while there are some distinguishing features between male and female gouramis, it can still be challenging to determine their gender, especially for younger fish that have not yet fully developed all the characteristics.
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Males have longer, pointed dorsal fins
The dorsal fin is the most distinctive feature that differentiates male and female gourami fish. Male gourami have longer dorsal fins that come to a point, while female gourami have shorter and rounded dorsal fins. This difference is easily noticeable when observing the fish from the side. The pointed dorsal fin of the male gourami forms a backward-pointing angle relative to the fish's body.
The dorsal fin is not the only difference between the sexes. Male gourami are usually slightly smaller and slimmer than females, who have rounder bodies and bellies. However, young gourami fish are harder to differentiate as they have not yet fully developed the physical characteristics of adults.
In addition to physical differences, male and female gourami exhibit different behaviours. Male gourami are generally more aggressive, especially towards other males. They may flare out their dorsal fins to appear larger when they see another male. They also build bubble nests for mating purposes, a behaviour not displayed by females.
The colouration of male and female gourami can also vary. Male gourami are often brighter and bolder in colour, particularly when trying to impress a female. Females, on the other hand, usually have duller and more subdued colours. However, this difference is not always apparent and varies among different types of gourami.
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Females have shorter, rounded dorsal fins
The dorsal fin is the most distinctive difference between male and female gourami fish. Females have shorter, rounded dorsal fins. This is in contrast to the male gourami, which has a longer dorsal fin that comes to a point. The dorsal fin of the male is larger and longer, and the back of the fin forms a point that points backward relative to the fish. The female gourami's dorsal fin is shorter and more rounded.
The dorsal fin is located on the top of the fish's body. The shape and size of the dorsal fin are one of the key physical characteristics that differentiate male and female gouramis. The male's dorsal fin is more elongated and pointed, while the female's is shorter and curves gently. The difference in their dorsal fins becomes more apparent when the fish are viewed from the side.
It is important to note that differentiating between male and female gouramis can be challenging, especially with younger fish. As the fish mature, their dorsal fins become more pronounced and distinct, making it easier to identify their gender. The dorsal fin is a reliable indicator of the gender of adult gouramis, but other physical characteristics, such as body shape and colour, can also provide additional clues.
In addition to the dorsal fin, female gouramis tend to have rounder bodies, particularly in the belly area. Their bellies may appear more swollen, especially when they are carrying eggs. The male gourami, on the other hand, tends to have a slimmer and more angular body shape.
Overall, the dorsal fin is the most distinctive feature for determining the gender of gourami fish, with females having shorter and rounded dorsal fins compared to the longer and pointed dorsal fins of male gouramis.
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Males are more colourful and brighter
Gourami fish are an attractive addition to any large tank, displaying beautiful colours that change when they are in different types of environments or moods. The male gourami is usually brighter in colour than the female gourami. This isn't always the case, but it's true more often than not. In most species, the male gourami has flashier and bolder colours than the female. The female is much duller in comparison.
With certain types of gourami fish, it's very simple to distinguish between males and females because of the different coloration. When this is the case, you don't even have to worry so much about paying attention to dorsal fins or body shapes. For example, the blue gourami's scales will turn bright blue when it is happy and excited, while the orange variety will display a stunning reddish-orange colour when breeding. Female gourami fish are brownish in colour, except during breeding season when they display bright orange bellies.
Males are smaller than females and have longer fins, but the most obvious difference between genders is the genital organ located at the base of their tails. The genitals of male gouramis are located at the base of the tail just above the anal fin, while females do not have any visible organs at all. Gourami fish can also be sexed by placing them side by side. Males will display vivid colours, while females are duller in colour.
Another example is the dwarf gourami. Male dwarf gouramis tend to have more colourful bodies than female dwarf gouramis. If you see a dwarf gourami with red, black or blue colour on its abdomen, face, and throat, then it is likely to be male. The colours are also more vivid, particularly during the spawning period. Meanwhile, female dwarf gourami has duller colours. It generally has a silver-greyish body. The colours are much more subdued compared to those of male dwarf gourami.
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Frequently asked questions
Male gouramis are usually smaller and slimmer than females. Females have rounder bodies and bellies that stick out. The dorsal fin is the most telling sign—male gouramis have longer dorsal fins that come to a point, while female gouramis have shorter and rounded dorsal fins.
Male gouramis are generally more aggressive, especially towards other male gouramis. They are ready to fight and will flare out their dorsal fins to appear larger. Male gouramis also build bubble nests for mating purposes and look after the eggs. Females are relatively docile and peaceful. They are less aggressive but will flare out their dorsal fins and turn their tails bright red when trying to defend their eggs.
Male gouramis often have brighter and bolder colors than female gouramis. During the spawning period, the colors of male gouramis become more intense and vivid, especially when there is a female present that they want to impress. Female gouramis have duller and more subdued colors, usually silvery or grayish.