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Ternetz's pacu (Myloplus ternetzi) — Serrasalmidae

Ternetz's pacu

Myloplus ternetzi
Family: Serrasalmidae
LC · Least Concern

The Ternetz's pacu (Myloplus ternetzi) is a freshwater fish of the family Serrasalmidae that grows up to 23 cm.

Length
23.1 cm
Water
Freshwater
Diet
Herbivore
Behaviour
Schooling
Activity
Diurnal
Body shape
Flat / disc-shaped
Substrate
Open water
Danger
Harmless
Range
Fresh water of northern South America (the Guianas and the Amazon region), in clear, forested rivers and creeks.
Edibility
Rarely eaten

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Description

Ternetz's pacu is a deep, strongly compressed, disc-shaped characin of the family Serrasalmidae reaching about 23 cm; the group is also called 'silver dollar'. The silvery, round body has a blunt snout with stout cutting teeth. Unlike the related piranhas this is a peaceful plant-eater: it lives on water plants, leaves, fruit and seeds, supplemented with insects, and helps disperse seeds in flooded forest. The species comes from clear, forested rivers and creeks of northern South America, the Guianas and the Amazon region, and swims in schools. Because of its handsome, coin-like shape it is popular in the aquarium hobby.

Frequently asked questions

How do you recognise the Ternetz's pacu?

The Ternetz's pacu has a flattened, disc-shaped body, is mainly silver-grey and shows a plain pattern. Deep, strongly laterally flattened, disc-shaped little characin (silver dollar) with incisor teeth; a peaceful plant-eater, not a piranha.

Where does the Ternetz's pacu live?

The Ternetz's pacu lives in fresh water and is mostly found around open water. Fresh water of northern South America (the Guianas and the Amazon region), in clear, forested rivers and creeks.

How big does the Ternetz's pacu get?

The Ternetz's pacu grows to a maximum of about 23 cm.

Is the Ternetz's pacu dangerous to humans?

No, the Ternetz's pacu is harmless to humans. None required: this species is harmless to humans.

Is the Ternetz's pacu edible?

The Ternetz's pacu is rarely eaten.

More photos

Ternetz's pacu (Myloplus ternetzi) — Serrasalmidae — 2
iNaturalist ((c) Julien Barataud, some rights reserved (CC BY-NC))
Ternetz's pacu (Myloplus ternetzi) — Serrasalmidae — 3
iNaturalist ((c) Thomas Menut, some rights reserved (CC BY-NC))
Ternetz's pacu (Myloplus ternetzi) — Serrasalmidae — 4
iNaturalist ((c) BOILEDIEU, some rights reserved (CC BY-NC))
Fin

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All data

Identification

English name
Ternetz's pacu verified
Scientific name
Myloplus ternetzi
Family
Serrasalmidae

Appearance

Size class
Medium verified
Max length (cm)
23.1 verified
Body shape
Flat / disc-shaped sourced
Dominant colour
Silver / grey sourced
Pattern
Plain sourced
Tail shape
Forked inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Freshwater verified
Substrate
Open water verified
Natural range
Fresh water of northern South America (the Guianas and the Amazon region), in clear, forested rivers and creeks. verified
Origin
Native verified

Behaviour & biology

Diet
Herbivore verified
Diet (detail)
Aquatic plants, leaves, fruits and seeds, supplemented with insects sourced
Social behaviour
Schooling verified
Territorial
No verified
Activity
Diurnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
Yes verified
Seasonality
Spawns in the rainy season in flooded forest; it then eats a lot of fallen fruits and seeds. sourced
Special features
Deep, strongly laterally flattened, disc-shaped little characin (silver dollar) with incisor teeth; a peaceful plant-eater, not a piranha. sourced

For anglers

Edibility
Rarely eaten verified
Fishing method
Fishing with plant bait or paste bait on a bottom or float rig. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
First aid
None required: this species is harmless to humans. sourced

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Myloplus

More from the family Serrasalmidae

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