The Birkhahn's rivulus (Cynodonichthys birkhahni) is a freshwater fish of the family Rivulidae that grows up to 6 cm.
Description
The Birkhahn's rivulus is a killifish (Rivulidae) from shallow pools, streams and swamps of Panama in Central America. The species grows to about 5 cm and has a slender, cylindrical body; males are brightly coloured with spots and coloured fin margins. Many relatives are annual: their eggs survive a dry period in the soil. As a bottom-oriented fish it snaps at insects, larvae and small invertebrates. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Birkhahn's rivulus?
The Birkhahn's rivulus has an elongate, eel-like body, is mainly multicoloured and shows a spots pattern.
Where does the Birkhahn's rivulus live?
The Birkhahn's rivulus lives in fresh water and is mostly found around open water.
How big does the Birkhahn's rivulus get?
The Birkhahn's rivulus grows to a maximum of about 6 cm.
Is the Birkhahn's rivulus dangerous to humans?
No, the Birkhahn's rivulus is harmless to humans.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
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Status & sources
Same genus Cynodonichthys
More from the family Rivulidae
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