Common Name
Blue Line Minnow
Aphyocypris cf. lini
In the aquarium trade, this fish is often sold as Aphyocypris cf. lini and nicknamed Blue Line for its narrow, metallic stripe. The cf. tag is used when an import resembles a known species, in this case Aphyocypris lini, but a firm scientific identification is not certain from trade sources alone.
Origin and Habitat
Aphyocypris lini is a small minnow native to southern China and was historically recorded from Hong Kong, with later records and related reports from nearby parts of southeast China. Aquarium fish sold as Blue Line are generally attributed to the same broader region, although exact collection localities are rarely disclosed.
In the wild, Aphyocypris lini is associated with clear, shallow waters.
Physical Characteristics
| Feature | Description |
|---|---|
| Body Shape | Slender and streamlined |
| Coloration | Light silver with a narrow, metallic blue stripe along the side |
| Size | Up to 3.5 cm (1.4 inches) in length |
FAQ
What is the scientific classification of this fish?
The fish is commonly referred to as Aphyocypris cf. lini. The ‘cf.’ indicates that it closely resembles Aphyocypris lini but a definitive scientific identification cannot be confirmed from trade sources alone.
What kind of water conditions does this fish prefer?
This species thrives in clear, shallow waters with moderate to gentle current. It prefers temperatures between 18°C and 24°C and a slightly acidic to neutral pH range.
Is this fish suitable for community tanks?
Yes, Blue Line Minnows are generally peaceful and can coexist with other small, non-aggressive fish species in a well-maintained community tank.

Jack Poole –
The Blue Line Minnows arrived healthy and active. They have a striking blue stripe that stands out in the tank. Easy to care for and get along well with my other small fish. Water parameters are stable with regular maintenance.
Emily Poole –
These fish are beautiful and add a nice visual element to the tank. They swim quietly and don’t stress other fish. I’ve kept them for three months and they remain active and vibrant.
Liam Howard –
Great addition to my community tank. The metallic blue stripe is very noticeable. They are hardy and adapt well to my tank conditions. I appreciate the clear description and accurate shipping.