Gnomus tube-snouted ghost knifefish (Sternarchorhynchus gnomus)

Scientific name: Sternarchorhynchus gnomus de Santana & Taphorn, 2006

The Gnomus tube-snouted ghost knifefish (Sternarchorhynchus gnomus) is a freshwater fish of the family Apteronotidae. In the aquarium it needs water at 28°C (82°F). Native range: South America, Lower R?o Caroni, Venezuela.

Gnomus tube-snouted ghost knifefish care at a glance

Temperature
28°C (82°F)

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.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Sternarchorhynchus gnomus
Family
Apteronotidae (Ghost knifefishes)
Order
Gymnotiformes (Knifefishes)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
15.2
Environment
Freshwater;; pH range: 6.6 - 7.6 benthopelagic
Climate
Tropical
Distribution
South America: Lower R?o Caroni, Venezuela.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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