Rio pearlfish (Nematolebias whitei) fish species and information / pictures of Rio pearlfish - Nematolebias whitei

Rio pearlfish (Nematolebias whitei) fish species information

Scientific Name
Nematolebias whitei

Common Name
Rio pearlfish

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 13-19; Anal spines: 0; Anal soft rays: 18 - 24; Vertebrae: 29 - 31. Having series of small bluish white spots, often coalesced to form continuous or fragmented line, on subdistal area of caudal fin and dark brown to black stripe on border of anal fin, adjacent and parallel to perpendicular extensions of subdistal golden transverse lines. Dorsal head profile slightly convex to nearly straight in male, gently concave to approximately straight in female (Ref. 42934).

Classification

Classified By

Myers, 1942

Class

Ray-finned fishes (Actinopterygii)

Order

Live bearers, Killifishes and Rivulines (Cyprinodontiformes)

Family

Rivulines (Rivulidae)

Distribution

Region

South America

Distribution

South America: Laguna de Araruama basin, Das Ostras River basin, coastal plains adjacent to the mouth of S?o Jo?o River in Brazil.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

20 °C

Water Temperature To

23 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; ; pH range: 6.5 - 7.0; dH range: 5 - 8 benthopelagic; non-migratory

Trophic Level

3.23 s.e. 0.39 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

8.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.7500 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 (tm=0.1)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated