燕子美人

Iriatherina werneri — Swallow Rainbowfish

Iriatherina werneri, the Threadfin or Featherfin Rainbowfish, is a delicate and spectacularly ornate fish from Australia and New Guinea, with males bearing impossibly long, feathered dorsal and anal fin extensions that ripple with every movement. Despite its exotic appearance, it is a peaceful micro fish that does best in calm, well-planted nano tanks with gentle filtration. Females are plainer but similarly petite.