
Cosby / Opaline Three-Spot Gourami (Trichopodus trichopterus) – 3–7cm & XL
22–28°C · pH 6–8 · 160L

A striking red Three-Spot Gourami with bold colour and classic labyrinth fish character. Ideal for spacious community tanks. Buy online with UK delivery.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Product-photo provenance and any image-specific limitations are stated on the listing.
Trichopodus trichopterus
Save when buying multiple fish. Each quantity is one fish; sex and pair formation are not guaranteed unless the selected variant explicitly states them.
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A striking red Three-Spot Gourami with bold colour and classic labyrinth fish character. Ideal for spacious community tanks. Buy online with UK delivery.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Product-photo provenance and any image-specific limitations are stated on the listing.

22–28°C · pH 6–8 · 160L

22–28°C · pH 6.5–8 · 1000L

22–28°C · pH 6–7.5 · 40L

24–28°C · pH 6–7.5 · 40L
Maintain these water conditions for optimal health and vibrant colors
Red Three-Spot Gourami is a domestic red-gold colour form of Trichopodus trichopterus, the Three-Spot Gourami. Older supplier material may use Trichogaster trichopterus, but current taxonomy places the species in Trichopodus.
One quantity supplies one unsexed fish in the selected approximate size grade. The current Shopify options range from 4–5cm to 7–8cm. These are dispatch sizes, not final adult sizes.
| Current scientific name | Trichopodus trichopterus |
|---|---|
| Adult size | About 12–15cm |
| Recommended aquarium | 120 litres minimum; 150–180 litres or more gives a better margin |
| Temperature | 22–28°C |
| pH | 6.0–8.0 |
| Hardness | About 5–20 dGH |
| Temperament | Semi-aggressive; males can be territorial |
| Diet | Omnivore |
| Tank region | Middle and upper water with regular surface visits |
Use a mature aquarium with open upper swimming space, planted or wooded sight breaks and floating cover. A single adult can use 120 litres, but 150–180 litres or more is a better choice where other fish are present or where more than one gourami is being considered.
Provide gentle to moderate filtration. Gouramis use a labyrinth organ to breathe atmospheric air, but this does not make filtration optional. Ammonia and nitrite should remain at zero, with regular maintenance and good surface access.
Fit a lid while leaving a normal air space above the water. Floating plants can provide security, but do not allow the surface to become completely blocked.
Use a varied omnivore diet based on a quality flake, granule or small pellet suitable for medium tropical fish. Rotate small frozen or live foods such as daphnia, brine shrimp, mosquito larvae or bloodworm in sensible portions, with some plant-based ingredients included in the wider diet.
Feed one or two modest meals each day. Gouramis are confident feeders, so avoid adding food repeatedly just because the fish approaches the glass. Remove persistent leftovers.
Choose robust but peaceful fish that share the same water and are not persistent fin nippers. Medium tetras, suitable barbs, Corydoras and loaches can work in a sufficiently large aquarium. Avoid tiny fish, very timid species and aggressive labyrinth fish that compete for the same upper-water territory.
Two mature male Three-Spot Gouramis can become territorial, especially in a cramped aquarium. If keeping more than one gourami, provide much more space, heavy visual cover and a separation plan.
Mature males usually have a longer, more pointed dorsal fin, while females tend to show a rounder dorsal profile and a fuller body. Juvenile sexing is unreliable, so the current size grades are sold unsexed unless a future option explicitly says otherwise.
Three-Spot Gouramis are bubble-nest breeders. A mature male builds a nest at the surface, often beneath floating cover. A breeding setup requires calm water, a conditioned female and enough cover for the female to escape male attention. After spawning, the male guards the nest and can become strongly territorial.
The current accepted name is Trichopodus trichopterus. Older material may use Trichogaster trichopterus.
Plan for about 12–15cm as an adult. The 4–8cm options on this product are approximate dispatch sizes.
Use at least 120 litres for one adult, with 150–180 litres or more preferable for a community or multiple gouramis.
They are semi-aggressive rather than fully peaceful. Mature males can defend upper-water territory and may chase similar fish.
Keep them in stable tropical water around 22–28°C.
Use a varied omnivore diet with quality prepared food and appropriately sized frozen or live foods.
It is risky in a normal community aquarium. Multiple males need substantial space, visual barriers and a plan to separate them if one fish is repeatedly targeted.
Yes. Gouramis use a labyrinth organ and regularly breathe atmospheric air, so the surface must remain accessible.
No sex is guaranteed by the current size variants.
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