Gnomus tube-snouted ghost knifefish (Sternarchorhynchus gnomus) fish species and information / pictures of Gnomus tube-snouted ghost knifefish - Sternarchorhynchus gnomus

Gnomus tube-snouted ghost knifefish (Sternarchorhynchus gnomus) fish species information

Scientific Name
Sternarchorhynchus gnomus

Common Name
Gnomus tube-snouted ghost knifefish

Biology
Anal soft rays: 159 - 177. Distinguished from all congeners by the following combination of characters: snout strongly curved; head and mid-dorsum as dark as dorsolateral areas; anal and pectoral fins translucent, without conspicuous distal dark margins; scales present along anterodorsal region of body; 6-7 scales above lateral line at mid-body; 159-177 total anal-fin rays; five branchiostegal rays; greatest body depth 9.3-11.4% of length to end of anal fin; snout to anus 58.4-77.6% of length to end of anal fin; pre-pectoral fin length 34.8-41.0% of HL; snout length 57.6-65.4% of HL; head depth at nape 39.7-44.9% of HL; postocular distance 36.9-41.6% of HL; eye diameter 4.1-7.6% of HL; internarial distance 2.7-7.0% of HL; branchial opening 9.5-12.3% of HL; tail length 10.1-17.4% of length to end of anal fin; tail depth 8.3-13.8% of caudal length (Ref. 56955).

Classification

Classified By
de Santana & Taphorn, 2006
Class
Ray-finned fishes (Actinopterygii)
Order
Knifefishes (Gymnotiformes)
Family
Ghost knifefishes (Apteronotidae)

Distribution

Region
South America
Distribution
South America: Lower R?o Caroni, Venezuela.
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
28 °C
Water Temperature To
Unknown °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
benthopelagic
Environment
Freshwater; ; pH range: 6.6 - 7.6 benthopelagic
Trophic Level
3.24 s.e. 0.27 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
False

Physical Size and Genetics

Maximum Length
15.2 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
Unknown
Vulnerability
Low vulnerability (10 of 100)
Resilience
Unknown
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated