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Spotted metynnis (Metynnis maculatus) — Serrasalmidae

Spotted metynnis

Metynnis maculatus
Family: Serrasalmidae

The Spotted metynnis (Metynnis maculatus) is a freshwater fish of the family Serrasalmidae that grows up to 18 cm.

Length
18 cm
Water
Freshwater
Diet
Herbivore
Behaviour
Schooling
Body shape
Flat / disc-shaped
Substrate
Open water
Danger
Harmless
Range
South America: Argentina, Brazil, French Guiana, Guyana
Edibility
Commonly eaten

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Description

The Spotted metynnis is a silver dollar, a deep-bodied characin (Serrasalmidae) from fresh water of the Amazon and Orinoco basins in South America. The species grows to about 18 cm and has a deep, round, strongly compressed, bright-silvery body, like a coin. Unlike piranhas it is mainly a plant-eater and grazes water plants and algae in schools. The fish is harmless to humans and is popular in the aquarium trade.

Frequently asked questions

How do you recognise the Spotted metynnis?

The Spotted metynnis has a flattened, disc-shaped body and is mainly silver-grey.

Where does the Spotted metynnis live?

The Spotted metynnis lives in fresh water and is mostly found around open water. South America: Argentina, Brazil, French Guiana, Guyana

How big does the Spotted metynnis get?

The Spotted metynnis grows to a maximum of about 18 cm.

Is the Spotted metynnis dangerous to humans?

No, the Spotted metynnis 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 Spotted metynnis edible?

Yes, the Spotted metynnis is commonly eaten.

More photos

Spotted metynnis (Metynnis maculatus) — Serrasalmidae — 2
iNaturalist ((c) Vincent A. Vos, some rights reserved (CC BY))
Spotted metynnis (Metynnis maculatus) — Serrasalmidae — 3
iNaturalist ((c) Nelson Wisnik, some rights reserved (CC BY-NC))
Spotted metynnis (Metynnis maculatus) — Serrasalmidae — 4
Wikimedia Commons — The Great Mule of Eupatoria (CC BY-SA 4.0)
Spotted metynnis (Metynnis maculatus) — Serrasalmidae — 5
Nelson Wisnik (CC BY-NC 4.0) via GBIF — iNaturalist
Fin

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All data

Identification

English name
Spotted metynnis sourced
Scientific name
Metynnis maculatus
Family
Serrasalmidae
Other names
Spotted metynnis; Silver dollar verified

Appearance

Size class
Medium verified
Max length (cm)
18.0 verified
Body shape
Flat / disc-shaped sourced
Dominant colour
Silver / grey sourced
Tail shape
Forked inferred

Habitat & distribution

Water type
Freshwater sourced
Substrate
Open water sourced
Natural range
South America: Argentina, Brazil, French Guiana, Guyana sourced
Origin
Native inferred

Behaviour & biology

Diet
Herbivore sourced
Diet (detail)
Algae, seaweeds and plant material inferred
Social behaviour
Schooling sourced
Territorial
No inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred

For anglers

Edibility
Commonly eaten inferred
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
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. verified

Status & sources

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

Same genus Metynnis

More from the family Serrasalmidae

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