Golden Harlequin Rasbora Trigonostigma Heteromorpha 3cm
Image for illustration purposes only. Exact colours, patterns, and size may vary between individuals.
Delivered alive, guaranteed
Live fish delivery is £20 per order, delivered Thursday, Friday or Saturday, arriving before 1:00pm on the day you choose at checkout. Packed by aquatic specialists and shipped overnight with a dedicated livestock courier, every fish is covered by our Live Arrival Guarantee with automatic refunds. See How Live Fish Delivery Works for full details.
When will my fish arrive?
| Order placed | Delivery day |
|---|---|
| Up to Monday 11:00am | Thursday (that week) |
| Monday after 11:00am – Tuesday 11:00am | Friday (that week) |
| Tuesday after 11:00am – Wednesday 11:00am | Saturday (that week) |
| Wednesday after 11:00am – Sunday (any time) | Thursday (following week) |
Overview
The Golden Harlequin is a selectively bred colour form of the classic Harlequin Rasbora, with a warm gold body and the familiar black triangular wedge softened to smoky bronze. The wild species comes from gently flowing forest streams of Malaysia, Thailand, Singapore, Sumatra and Borneo. It suits any peaceful planted community.
- Adult Size: Around 4.5–5 cm (2 in)
- Lifespan: 5–8 years
Origin
- Native to: Peninsular Malaysia, southern Thailand, Singapore, Sumatra, Borneo
- Habitat: Slow, tannin-stained forest streams with Cryptocoryne
Feeding
- Diet: Omnivorous micropredator
- Preferred Foods: Flake, micro granules, daphnia, brine shrimp, bloodworm
- Feeding Habits: Once or twice daily; vary live, frozen and dried
Tank Mates
- Best with: Tetras, other rasboras, corydoras, small loaches, dwarf gouramis
- Avoid: Fin nippers and large predatory fish
Aggression & Behaviour
- Temperament: Very peaceful
- Territoriality: None; a tight shoaling species
Experience Level
- Difficulty: Beginner
- Challenges: Needs a group of 8–10 to show natural behaviour
Water Parameters
- Water Type: Freshwater, soft and slightly acidic
- Temperature: 21–28°C (70–82°F)
- pH: 5.0–7.5
- Hardness: 1–12 dGH
- Flow: Slow to moderate
- Tank Size: Minimum 60 litres for a group of 8–10
Final Notes
A hardy, undemanding shoaler that simply needs company, stable water and planting to look its best; a lone or small group stays pale and nervous. Unusually for a rasbora, spawning pairs attach eggs to the underside of broad leaves. Males are slimmer and more intensely coloured, females rounder in the belly. Alongside standard Harlequins the gold form makes a lovely mixed shoal.
Please Note
The livestock that is sold on our online site is not held in store at our Birchwood Aquatic Centre shop. Species sold at the Birchwood Aquatic Centre physical store may differ from ones available to order to your door.
Frequently Asked Questions
In insulated boxes designed for live transport, packed by aquatic specialists,
overnight with a licensed live-animal courier, arriving before 1pm.
It is covered by our Live Arrival Guarantee.
Photograph it within 4 hours of delivery, email info@birchwoodaquaticcentre.co.uk with your order number, and the refund is processed automatically. The cover continues for 7 days after arrival.
Wednesday, Thursday, Friday and Saturday. You pick your day at checkout; please choose a day someone is home.
Yes. One basket, one checkout; the fish arrive with the specialist courier and the rest of your order ships as normal.
We can deliver to UK mainland only for live fish.
Follow the five-minute acclimatisation steps in our When Your Fish Arrive guide: float the bags, add tank water gradually, net the fish in, lights low, feed tomorrow.