Scientific Name
Rivulus cylindraceus

Common Name
Green rivulus

Biology
Found in upland streams (Ref. 4537). Abundant in rivers and lakes with clear and abundant vegetation (Ref. 13498). Not a seasonal killifish. Is easy to maintain in the aquarium (Ref. 27139).

Classification

Classified By

Poey, 1860

Class

Ray-finned fishes (Actinopterygii)

Order

Live bearers, Killifishes and Rivulines (Cyprinodontiformes)

Family

Rivulines (Rivulidae)

Distribution

Region

Central America

Distribution

Central America: coastal river basins of Cuba.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

22 °C

Water Temperature To

24 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; ; pH range: 7.0 - 7.0; dH range: 7 - 9 benthopelagic; non-migratory

Trophic Level

3.21 s.e. 0.38 Based on size and trophs of closest relatives

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

5.5 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Aquarium: commercial

Vulnerability

Low vulnerability (10 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Least Concern (LC)