Niger tetra (Arnoldichthys spilopterus) fish species and information / pictures of Niger tetra - Arnoldichthys spilopterus

Niger tetra (Arnoldichthys spilopterus) fish species information

Scientific Name
Arnoldichthys spilopterus

Common Name
Niger tetra

Biology
Anal spines: 3; Anal soft rays: 11. Parietal fontanel absent. Sexual dimorphism on anal fin: females - hyaline with black spot on rays beneath adipose fin, males - lemon yellow (sometimes red-yellow) with 5 dark or black bands and colored margin. Two lateral bands, upper red-orange, lower blue-green. Upper part of eye red. Dorsal with black spot lined with a clear zone which occupies 2/3 of the anterior portion of the dorsal. Scales below lateral big. Caudal stripe extending in middle of caudal fin from base to fork.

Classification

Classified By
Boulenger, 1909
Class
Ray-finned fishes (Actinopterygii)
Order
Characins (Characiformes)
Family
African tetras (Alestidae)

Distribution

Region
Africa
Distribution
Africa: lower Niger and Ogun rivers in Nigeria.
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
23 °C
Water Temperature To
28 °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
9.6 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 1.0000 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
Medium, minimum population doubling time 1.4 - 4.4 years (Fec=1000)
Threat To Humans
  Harmless
IUCN Red List Status
  Vulnerable (VU) (B1ab(ii,iii,v)+2ab(ii,iii,v))