Scientific Name
Gymnocorymbus ternetzi

Common Name
Black tetra

Biology
Occurs in the middle and upper water layers. Feeds on worms, small crustaceans and insects (Ref. 7020). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm (Ref. 51150).

Classification

Classified By

Boulenger, 1895

Class

Ray-finned fishes (Actinopterygii)

Order

Characins (Characiformes)

Family

Characins (Characidae)

Distribution

Region

South America

Distribution

South America: Paraguay and Guapor? River basins to Argentina (Ref. 9086).

Range

11°S - 30°S, 64°W - 48°W

Environment

Climate

Subtropical

Water Temperature From

20 °C

Water Temperature To

26 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

pelagic

Environment

Freshwater; ; pH range: 6.0 - 8.0; dH range: 5 - 19 pelagic

Trophic Level

3.12 s.e. 0.32 Based on food items.

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

7.5 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Aquarium: highly commercial

Vulnerability

Low vulnerability (10 of 100)

Resilience

High, minimum population doubling time less than 15 months (tm

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated