Kissing Gourami
Helostoma temminckii
Famous for the 'kiss' — two specimens pressing their fleshy lips together. It's not romance but a territorial strength test: the protrusible lips are equipped with tiny teeth used to scrape algae and to gauge a rival's strength. Reaches 20–30 cm and needs large tanks. Available in pink (farmed) and silver-green (wild). An insatiable algae eater.
Water Temperature
22 - 28 °C
pH Value
6 - 8
Water type
Freshwater
Tank level
Middle
Adult size
25 cm
Minimum tank volume
>= 250 L
Minimum group
>= 1
GH
4 - 15 dGH
KH
2 - 7 dKH
TDS
80 - 295 ppm
Conductivity
125 - 461 uS/cm
Species description
Geographical Origin and Habitat: Southeast Asia (Thailand, Indonesia, Malay Peninsula). Typical inhabitant of very slow river deltas, stagnant swamps and oxygen-poor blackwaters.
Taxonomy and Morphology: Kissing Gourami (Helostoma temminckii). Unique in the genus Helostomatidae. Compressed disc body, massive dimensions. Develops a labyrinth organ to breathe air and is famous for its prominent and thick "sucker mouth" formed by huge lips, which it uses to scrape.
Social Behavior: It never stays still and males are extremely bellicose with each other. The famous "kisses" are actually challenges of territorial strength and open-mouthed shoving to determine the dominant male; the weak one is driven away.
Coloration and Sexual Dimorphism: In nature there is the wild dark green form with dark streaks. However, almost 100% of the fish in stores are leucistic mutations (Pale Pink or "Pink"). No apparent sexual dimorphism, apart from size for the male.
Care, breeding and tankmates
Aquarium Setup: Requires immense aquariums in adulthood (minimum 150-180 cm / 60-70 inches for a group). It has the bad habit of eating all aquatic plants (if Anubias are planted, it will devour the soft new leaves). Many rocks to define territories.
Diet and Feeding: Omnivorous and algae scraper (Aufwuchs). Grazes algal fuzz on rocks, but is ravenous for plant feeds: spirulina tablets, blanched spinach and frozen bloodworms. Defecates in catastrophic quantities.
Water Quality: Tolerant beyond imagination. Breathes air, so it survives the absence of aquatic oxygen and withstands chemical shocks. However, a poor filter leads to irretrievable turbidity due to its voluminous diet.
Compatibility and Cohabitation: Can only cohabit in communities of gigantic fish. Will ignore large and mild fish like Clown Loaches or large Barbs, but if kept with Corydoras it will terrify them by scraping their backs by mistake (or out of malice).
Aquarium Breeding: Unlike other Gouramis, it does NOT build bubble nests nor protect its children. It simply lays thousands of eggs (lighter than water, which float) in an embrace and then escapes leaving them to fate.
Risks and Diseases: The "cute pink fish" that destroys the tank. It is one of the most abandoned fish due to buyer ignorance: it grows out of all proportion (25 cm / 10 inches), eats all the plants in the Layout and dirties more than an Oscar.
Geographic Origin and Distribution
Southeast Asia (Thailand, Indonesia, Malay Peninsula). Typical inhabitant of very slow river deltas, stagnant swamps and oxygen-poor blackwaters.
Origin
Selective breeding and cultivarsNorth AmericaSouth and Southeast Asia
Fish profile
- Temperament
- Semi-aggressive
- While young specimens are peaceful, adults can develop a cranky and moderately aggressive temperament. The famous 'kissing' behavior is actually a form of territorial jousting and asserting dominance. They are bold fish that will interact heavily with their environment.
- Diet
- Omnivore
- They are omnivores with specialized lips adapted for rasping algae from surfaces. Their diet must include a large amount of vegetable matter, such as spirulina flakes or blanched spinach. Supplement this with meaty foods like bloodworms and brine shrimp.
- Life expectancy
- 5-7 years
- Under optimal aquarium care, the Kissing Gourami typically lives between 5 and 7 years, though they are exceptionally long-lived and can reach up to 20 or even 25 years in very large setups. Their longevity is highly dependent on a diet rich in vegetable matter and consistent filtration to handle their high waste output. Providing them with a spacious tank prevents physical stunting and contributes greatly to a longer life.
- Adult size
- 25 cm
- The catalog's scalar value is 25 cm. The FishBase SPECIES table (v25.04 snapshot) source reports a maximum adult measurement of 30 cm for this species, recorded as total length (TL). The taxonomic record consulted is Helostoma temminckii (v25.04); male or unsexed record. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Sex ratio
- Flexible
- Sexing Kissing Gouramis is virtually impossible as there are no obvious visual differences between males and females. It is common to keep them in groups when young, but adults may become intolerant of each other. A very large tank is required if attempting to keep multiple adults together.
- Feeding frequency
- 2-3 times daily
- They should be fed one to two times daily. Since they constantly graze on algae throughout the day, providing a steady supply of vegetable matter is important. Be careful not to overfeed meaty items, which can cause digestive issues.
- Bioload
- High
- The Kissing Gourami grows quite large and generates a significant bioload as an adult. Their constant feeding on algae and foods results in substantial waste production. Excellent mechanical and biological filtration, along with regular water changes, are strictly necessary.
- Flow
- Strong
- They prefer slow to moderate water flow, typical of the sluggish rivers and swamps they inhabit. Strong currents will stress them and impede their ability to reach the surface to breathe air. A gentle filter return is ideal for their comfort.
- Jump risk
- No
- Reproduction
- Bubble nest builder
- They are egg-scatterers that release buoyant eggs which float to the water's surface. Unlike other gouramis, they do not build bubble nests and offer absolutely no parental care. The adults will readily eat the eggs, so a separate breeding tank is required.
- Compatibility & tankmates
- Peaceful
- They are semi-aggressive and can become bullies as they mature. They should be kept with other robust, similarly sized fish like larger barbs or peaceful cichlids. Avoid keeping them with small, timid fish that they might harass or outcompete for food.
- Tank level
- Middle
- They utilize all levels of the aquarium but frequently visit the surface to breathe atmospheric air. They spend much of their time grazing on plant leaves, glass, and decorations in the middle levels. Ensure there is plenty of open swimming space.
Scientific Parameters & Models
FishBase
Window to the official scientific data of the species
Data synced on: 06/15/2026
- Trophic level
- 2.8 ± 0.33 se
- Resilience
- High (less than 15 months)
- Generation time
- 1.3 years
- Phylogenetic uniqueness (PD50)
- 1.5
- Bayesian Length-Weight
- a = 0.01995, b = 3.01
- VulnerabilityLow vulnerability (19 / 100)
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Recommendations grouped by close relatives, companion choices, and similar care.
