Fin's Fish Guide
The Harald's rivulus (Atlantirivulus haraldsiolii) is a freshwater fish of the family Rivulidae that grows up to 5 cm.
Description
The Harald's rivulus is a killifish (Rivulidae) from shallow pools, streams and swamps of the coastal region of southeastern Brazil. The species grows to about 6 cm and has a slender body; males are brightly coloured with spots, marbling 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 Harald's rivulus?
The Harald's rivulus has an elongate, eel-like body, is mainly multicoloured and shows a spots pattern.
Where does the Harald's rivulus live?
The Harald's rivulus lives in fresh water and is mostly found around open water. South America: Brazil
How big does the Harald's rivulus get?
The Harald's rivulus grows to a maximum of about 5 cm.
Is the Harald's rivulus dangerous to humans?
No, the Harald's 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 Atlantirivulus
More from the family Rivulidae
Want the complete picture on the Harald's rivulus?
Point your camera at the fish and Fin names the species in seconds. Free, and the Harald's rivulus is one of 12,519 species in the app.