Fin's Fish Guide
The Straighttail rivulus (Laimosemion rectocaudatus) is a freshwater fish of the family Rivulidae that grows up to 6 cm.
Description
The Straighttail rivulus is a killifish (Rivulidae) from shallow forest streams, pools and swamps of the Amazon basin in South America. The species grows to about 4 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; some relatives can briefly move across moist ground. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Straighttail rivulus?
The Straighttail rivulus has an elongate, eel-like body, is mainly multicoloured and shows a spots pattern.
Where does the Straighttail rivulus live?
The Straighttail rivulus lives in fresh water and is mostly found around open water. South America: Peru
How big does the Straighttail rivulus get?
The Straighttail rivulus grows to a maximum of about 6 cm.
Is the Straighttail rivulus dangerous to humans?
No, the Straighttail rivulus 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.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Laimosemion
More from the family Rivulidae
Want the complete picture on the Straighttail rivulus?
Point your camera at the fish and Fin names the species in seconds. Free, and the Straighttail rivulus is one of 12,519 species in the app.