Scientific Name
Rivulus hartii

Common Name
Hart's rivulus

Biology
Occurs at the foot of waterfalls, in swamps, streams and ponds (Ref. 11225). Eaten in its native range and exported for the ornamental trade (Ref. 4537). Not a seasonal killifish. Is difficult to maintain in aquarium (Ref. 27139). Has been observed to hunt insects from overhanging vegetation by jumping out of the water; has also been observed to travel on land and feed on insects in wet weather (Ref. 43279). Oviparous (Ref. 205).

Classification

Classified By

Boulenger, 1890

Class

Ray-finned fishes (Actinopterygii)

Order

Live bearers, Killifishes and Rivulines (Cyprinodontiformes)

Family

Rivulines (Rivulidae)

Distribution

Region

South America

Distribution

South America: Caribbean coastal river basins.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

22 °C

Water Temperature To

26 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; brackish; benthopelagic; non-migratory

Trophic Level

3.03 s.e. 0.40 Based on food items.

Occurs in Marine / Salt water

False

Occurs in Brackish water

True

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

10.0 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

Fisheries: commercial; 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

Not Evaluated