Fin's Fish Guide
The Straightmouth hemiodus (Hemiodus orthonops) is a freshwater fish of the family Hemiodontidae that grows up to 31 cm.
Description
The straightmouth hemiodus is a characin (Hemiodontidae) from fresh water of the Parana and Paraguay basins in South America. The species grows to about 31 cm and has a streamlined, silvery body with a spot on the flank and a stripe on the lower tail lobe. As a fast schooling fish it swims in clear rivers and eats algae, plant material, small invertebrates and detritus. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Straightmouth hemiodus?
The Straightmouth hemiodus has a torpedo-shaped body and is mainly silver-grey.
Where does the Straightmouth hemiodus live?
The Straightmouth hemiodus lives in fresh water and is mostly found around mixed bottom. South America: Argentina, Brazil, Paraguay
How big does the Straightmouth hemiodus get?
The Straightmouth hemiodus grows to a maximum of about 31 cm.
Is the Straightmouth hemiodus dangerous to humans?
No, the Straightmouth hemiodus 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 Hemiodus
More from the family Hemiodontidae
Want the complete picture on the Straightmouth hemiodus?
Point your camera at the fish and Fin names the species in seconds. Free, and the Straightmouth hemiodus is one of 12,519 species in the app.