The Dusky rivulus (Anablepsoides atratus) is a freshwater fish of the family Rivulidae that grows up to 4 cm.
Description
The Dusky rivulus is a killifish (Rivulidae) from shallow streams, pools and swamps of the Amazon basin in South America. The species grows to about 5 cm and has a slender, cylindrical body; males are brightly coloured with spots and coloured fin margins. As a bottom-oriented fish of calm, often oxygen-poor water it snaps at insects, larvae and small invertebrates; in drought it can briefly move across moist ground. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Dusky rivulus?
The Dusky rivulus has an elongate, eel-like body, is mainly multicoloured and shows a spots pattern.
Where does the Dusky rivulus live?
The Dusky rivulus lives in fresh water and is mostly found around open water.
How big does the Dusky rivulus get?
The Dusky rivulus grows to a maximum of about 4 cm.
Is the Dusky rivulus dangerous to humans?
No, the Dusky rivulus is harmless to humans.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Anablepsoides
More from the family Rivulidae
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