Three-Spot Gourami: Light-Tackle Fun in Bangkok's Canals

Bangkok is not the first city that springs to mind for urban fishing. Yet threading through the metropolitan sprawl is a network of khlongs — canals — and alongside the paddies, reservoirs, and urban ponds that fringe the city, these waterways hold a small but spirited native species that rewards any angler willing to scale down their tackle and slow down their approach. The three-spot gourami (Trichopodus trichopterus), known locally as pla kradi, is arguably the most accessible freshwater fish in Greater Bangkok — present, catchable, and genuinely enjoyable on the right gear.

Biology and Identification

The three-spot gourami is a compact labyrinth fish, closely related to the snakeskin gourami, kissing gourami, and giant gourami. Adults typically reach 10–15 cm and weigh 40–80 g, with exceptional fish occasionally nudging 100 g. The body is laterally compressed and roughly oval — noticeably rounder in proportion than the more elongated snakeskin gourami.

Colouration in wild fish is a muted blue-grey to olive-silver, often with faint darker barring across the flanks under bright light. The defining characteristic is the trio of spots for which the species is named: a prominent dark spot centred on the flank, a second at the base of the tail, and — counting the eye as the third — hence the name. In certain light or under stress, fish show iridescent blue-green scaling that can be quite striking.

The ventral fins are elongated into the characteristic gourami feelers, used to probe substrate and detect prey by touch. Like all labyrinth fish, T. trichopterus breathes air via its labyrinth organ and must periodically surface. You will observe this behaviour regularly when fishing — fish rise vertically, gulp, and descend, often in a consistent rhythm that betrays their position.

Males are territorial during breeding and construct bubble nests at the surface, anchored to floating vegetation. The nest-guarding behaviour makes breeding males aggressive and easy to locate — a fish you can see building or guarding a nest is often a fish you can catch.

Where to Find Them in Thailand

Bangkok khlongs (canals): The city's canal network — particularly in outer districts such as Min Buri, Lat Krabang, and along the Prawet Burirom Canal — holds three-spot gourami in sections where water hyacinth, lotus, and emergent sedges provide cover. Inner-city canals are generally too polluted, but the periphery offers genuine fishing.

Urban and peri-urban ponds: Ornamental ponds, temple grounds with fish ponds, and agricultural borrow pits around Bangkok frequently hold resident populations. Permission from the landowner or temple authorities is often straightforwardly obtained.

Pay-lakes: Several Bangkok-area pay-lakes and Boon Mar Ponds stock or naturally hold three-spot gourami. They are rarely the target species at larger venues but can be found along margins near vegetation.

Reservoirs and irrigation ponds: Shallow margins of central-region reservoirs — particularly where emergent vegetation is present — support populations. Anglers targeting silver barb or striped catfish in these venues will often encounter three-spot gourami as a welcome incidental catch.

The species is rare in fast-flowing rivers or cold upland streams. Its natural range centres on the lowland Chao Phraya drainage, though it is present across much of mainland Southeast Asia and has been widely introduced beyond its native range.

Seasons and Conditions

Three-spot gourami are active through the warmer months and reach their fishing peak from April through October. The species does not go completely dormant in the cool season, but feeding slows noticeably when water temperatures drop below around 22°C.

Hot-dry season (March–May): Counterintuitively, this can be excellent — fish are concentrated in remaining water bodies and feeding actively in early mornings. By 9 am in April the surface is already warming, so start at first light.

Rainy season (June–October): Fish spread across flooded margins and paddy fields. Surface feeding is at its peak during overcast mornings before rain. Bubble-nest building is common, and locating nests is an effective way to find concentrations of fish.

Cool-dry season (November–February): Fishing slows. Fish are present but require a more patient, slower presentation. Bait outperforms lures and flies at this time of year.

Surface feeding — the behaviour that makes three-spot gourami such enjoyable fly-fishing targets — peaks on overcast, warm mornings when terrestrial insects fall onto the water and subsurface food supply is active.

Techniques

Surface Bait Fishing

The simplest and most traditional approach. A small piece of floating bread crust, a grasshopper threaded onto a fine-wire hook, or a small maggot fished just under the surface on a quill float will account for fish consistently. The key is stealth — approach slowly, keep false casting minimal (for fly fishing), and present the bait as naturally as possible near cover.

When fish are visibly rising or holding near the surface, a freelined bait — no float, no weight — presented delicately allows maximum sensitivity and feels startlingly similar to dry-fly fishing.

Dry-Fly and Surface Fly Fishing

Three-spot gourami are among the most fly-accessible freshwater species in Thailand. Their habitual surface feeding, their tendency to hold in visible positions near vegetation, and their willingness to take a well-presented fly make them ideal targets for anglers who want to practise dry-fly or light-nymph techniques in a tropical setting.

Effective dry patterns include:

• Elk hair caddis (size 14–16): floats well, matches the profile of many tropical terrestrials
• Parachute adams (size 14–16): visible on the water and reliably taken
• CDC emerger: excellent on overcast mornings when fish are taking emerging insects just in the film
• Foam ant or beetle pattern: useful when terrestrial falls are evident

Fish tend to be in the top 30 cm of the water column. Wet flies and soft-hackles fished just sub-surface account for fish that are not actively rising. A size 12–14 soft-hackle pheasant tail, retrieved in a slow figure-of-eight, works well.

See our tropical fly fishing setup guide for line weights, leader recommendations, and rod choices suited to Thailand's urban canal environments.

Light Spinning with Small Lures

Ultra-light lures — 1–2 g spinners, size 0 Mepps-style inline spinners, or tiny jigheads with soft-plastic bodies — work particularly in canals with gentle current. The retrieve must be very slow. Three-spot gourami are not predatory ambush hunters in the manner of snakeheads; they respond to small, slow-moving presentations rather than aggressive retrieves.

Consult our best snakehead lures guide for an overview of the ultra-light end of the lure spectrum, including options appropriate for gourami-sized fish.

Tackle

The pleasure of fishing for three-spot gourami is inseparable from using appropriately scaled gear.

Spinning: A 1.5–2.1 m ultra-light rod rated 1–5 g paired with a size 1000 reel and 2–3 lb monofilament or fluorocarbon. A light fluorocarbon leader aids presentation in clear water.

Float fishing: A simple 1.8–2.4 m float rod or a light spinning rod used as a float rod. A small quill or pencil float, size 14–18 fine wire hooks, and 2 lb line.

Fly fishing: 7–8 ft, 3–4 weight rod. Weight-forward floating line. A 9 ft tapered leader to 4X or 5X tippet. A small fly box with a dozen dry patterns and a few soft-hackles covers all situations.

No wire trace is needed — three-spot gourami have no cutting teeth. A landing net is helpful but not essential given the fish's size.

Angling Records

The three-spot gourami is not recognised in any IGFA world-record category. The species is not currently tracked as a sport fish by major international angling bodies. Published maximum sizes in scientific literature are approximately 15 cm total length; most fish caught on rod and line fall in the 8–12 cm range.

The Fight and Handling

A 12 cm three-spot gourami on a 3-weight fly rod in a Bangkok canal is, by any reasonable measure, a good time. The fish pulls with a determined, circular resistance, using its disc-shaped body to kite against the current and the line. There are no jumps and no long runs, but on genuinely light tackle — 2–3 lb line — the fish feels fully sporting for a minute or two.

Handle with wetted hands and return promptly if not keeping for the table. The species is robust and tolerates handling well if kept briefly and wet.

Conservation Notes

Three-spot gourami are not a threatened species in Thailand. The IUCN lists Trichopodus trichopterus as Least Concern globally. Wild populations in the Bangkok metropolitan area have proven resilient to urbanisation — a testament to the species' adaptability. They are also one of the world's most widely traded ornamental fish and are commercially bred in large quantities in Thailand and across Asia.

Localised pressure from subsistence netting in rural areas occurs but does not appear to affect overall population health. For context on Thai freshwater conservation issues see our protected and endangered species guide.

Planning Your Visit

Three-spot gourami fishing requires no specialist guiding and no expensive kit. A bus or taxi to the outer Bangkok khlongs, a light spinning rod, a small box of hooks and a tub of maggots, and permission from any nearby household to fish from the canal bank is the typical setup. Combine with a morning visit to a floating market or temple for a distinctly Bangkok fishing day that costs almost nothing and returns something genuinely authentic.

For more structured fishing near Bangkok, Boon Mar Ponds and Bang Na Lakes offer accessible urban venues. The Bangkok location guide covers additional fishing spots within the metropolitan area.

Related species: Snakeskin gourami | Kissing gourami | Giant gourami | Giant featherback