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drawing shows typical species in Rhamphichthyidae.
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drawing shows typical species in Rhamphichthyidae.
Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Gymnotiformes (Knifefishes) > Rhamphichthyidae (Sand knifefishes)
Etymology: Hypopygus: Greek, hypo = under + Greek, pyge = tail (Ref. 45335).
Etymology: Hypopygus: Greek, hypo = under + Greek, pyge = tail (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range Ecology
Freshwater; benthopelagic. Tropical
Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
South America: Orinoco and Amazon River basins and coastal rivers of the Guianas.
Size / Weight / Age
Occurs in shallow creeks with a sandy substrate (Ref. 12225). Maximum length reported to reach 10 cm TL (Ref. 12225).
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Main reference
Upload your references | References | Coordinator : Campos-da-Paz, Ricardo | Collaborators
Ferraris, C.J. Jr., 2003. Rhamphichthyidae (Sand knifefishes). p. 492-493. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36685)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Least Concern (LC) ; Date assessed: 01 September 2020
CITES
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial; aquarium: commercial
FAO - Publication: search | FishSource |
More information
Trophic ecology
Food items (preys)
Diet composition
Food consumption
Food rations
Predators
Food items (preys)
Diet composition
Food consumption
Food rations
Predators
Ecology
Ecology
Ecology
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Anatomy
Gill area
Brain
Otolith
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Tools
Special reports
Download XML
Internet sources
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00288 (0.00138 - 0.00605), b=3.09 (2.90 - 3.28), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278): 3.1 ±0.4 se; based on size and trophs of closest relatives