Fin's Fish Guide
The One-spot halftooth (Hemiodus unimaculatus) is a freshwater fish of the family Hemiodontidae that grows up to 33 cm.
Description
Hemiodus unimaculatus is a slender characin of the family Hemiodontidae from northern South America. The species has a streamlined, silvery body with a conspicuous round dark spot on the flank and a stripe running to the lower caudal lobe, and reaches about 33 cm. It occurs in fast-flowing rivers with a rocky bottom and is abundant in the lower reaches. As a detritus and aufwuchs feeder it feeds on detritus and periphyton from the bottom and surfaces. It matures at about 11 cm and spawns in the rainy season. The species is of limited local fishery importance and is sometimes found in the aquarium trade.
Frequently asked questions
How do you recognise the One-spot halftooth?
The One-spot halftooth has a torpedo-shaped body, is mainly silver-grey and shows a spots pattern. Round dark flank spot with a stripe to the tail; detritus and periphyton eater.
Where does the One-spot halftooth live?
The One-spot halftooth lives in fresh water and is mostly found around mixed bottom. Fast-flowing rivers of northern South America.
How big does the One-spot halftooth get?
The One-spot halftooth grows to a maximum of about 33 cm.
Is the One-spot halftooth dangerous to humans?
No, the One-spot halftooth 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.
Is the One-spot halftooth edible?
The One-spot halftooth is rarely eaten.
More photos
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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 One-spot halftooth?
Point your camera at the fish and Fin names the species in seconds. Free, and the One-spot halftooth is one of 12,519 species in the app.