Fin's Fish Guide
The Threadfin rainbowfish (Iriatherina werneri) is a freshwater fish of the family Melanotaeniidae that grows up to 4 cm.
Description
The threadfin rainbowfish is a small, graceful rainbowfish (Melanotaeniidae) from fresh water of northern Australia and southern New Guinea. The species grows to about 4 cm and has a slender body in which the males bear spectacular, strongly elongate, thread-like dorsal and anal rays, which they spread in courtship. As a schooling fish it lives in clear, plant-rich water and eats small invertebrates and plankton. The fish is harmless to humans and is popular in the aquarium trade.
Frequently asked questions
How do you recognise the Threadfin rainbowfish?
The Threadfin rainbowfish has a torpedo-shaped body and is mainly silver-grey.
Where does the Threadfin rainbowfish live?
The Threadfin rainbowfish lives in fresh water and is mostly found around sand or mud bottom. Oceania: Australia, Indonesia, Papua New Guinea
How big does the Threadfin rainbowfish get?
The Threadfin rainbowfish grows to a maximum of about 4 cm. On average the species is around 3 cm.
Is the Threadfin rainbowfish dangerous to humans?
No, the Threadfin rainbowfish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Threadfin rainbowfish edible?
Yes, the Threadfin rainbowfish is commonly eaten.
More photos
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
More from the family Melanotaeniidae
Want the complete picture on the Threadfin rainbowfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Threadfin rainbowfish is one of 12,519 species in the app.