Gymnarchus niloticus
E879447
Gymnarchus niloticus, commonly known as the African knifefish, is a large, nocturnal, weakly electric fish native to the Nile and other African freshwater systems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gymnarchus niloticus canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T10639878 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Gymnarchus niloticus Context triple: [Gymnarchidae, containsTaxon, Gymnarchus niloticus]
-
A.
Eutropius niloticus
Eutropius niloticus is a species of African freshwater catfish in the family Schilbeidae, commonly found in the Nile and associated river systems.
-
B.
Gyrinocheilus
Gyrinocheilus is a genus of freshwater algae-eating fish commonly known as Chinese algae eaters, popular in aquariums for their ability to control algae growth.
-
C.
Heterotis
Heterotis is a genus of African freshwater fish in the bonytongue family, known for species like the African arowana.
-
D.
Paradoxoglanis
Paradoxoglanis is a genus of electric catfishes known for their ability to generate electric discharges, belonging to the family Malapteruridae.
-
E.
Clarias
Clarias is a genus of airbreathing catfishes commonly known as walking catfish, found in freshwater habitats across Africa and Asia.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Gymnarchus niloticus Target entity description: Gymnarchus niloticus, commonly known as the African knifefish, is a large, nocturnal, weakly electric fish native to the Nile and other African freshwater systems.
-
A.
Eutropius niloticus
Eutropius niloticus is a species of African freshwater catfish in the family Schilbeidae, commonly found in the Nile and associated river systems.
-
B.
Gyrinocheilus
Gyrinocheilus is a genus of freshwater algae-eating fish commonly known as Chinese algae eaters, popular in aquariums for their ability to control algae growth.
-
C.
Heterotis
Heterotis is a genus of African freshwater fish in the bonytongue family, known for species like the African arowana.
-
D.
Paradoxoglanis
Paradoxoglanis is a genus of electric catfishes known for their ability to generate electric discharges, belonging to the family Malapteruridae.
-
E.
Clarias
Clarias is a genus of airbreathing catfishes commonly known as walking catfish, found in freshwater habitats across Africa and Asia.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
species of fish
ⓘ
weakly electric fish ⓘ |
| activityPattern | nocturnal ⓘ |
| bodyColor | generally dark or olive ⓘ |
| bodyShape |
elongated
ⓘ
knife-like ⓘ |
| class | Actinopterygii ⓘ |
| commonName |
Aba
ⓘ
African knifefish ⓘ |
| diet | carnivorous ⓘ |
| distributionContinent | Africa ⓘ |
| ecologicalRole | predator in freshwater ecosystems ⓘ |
| electricOrganDischargeType | wave-type ⓘ |
| electricOrganLocation | tail region ⓘ |
| electroreceptorType | tuberous electroreceptors ⓘ |
| family | Gymnarchidae ⓘ |
| finPosition | dorsal fin extends along most of body length ⓘ |
| foundIn | freshwater ⓘ |
| genus | Gymnarchus ⓘ |
| habitat |
floodplains
ⓘ
large rivers ⓘ swamps ⓘ |
| hasAnalFin | no anal fin ⓘ |
| hasCaudalFin | no distinct caudal fin ⓘ |
| hasDorsalFin | long continuous dorsal fin ⓘ |
| kingdom | Animalia ⓘ |
| locomotion | backward and forward swimming with similar ease ⓘ |
| maximumLength |
about 1.5 m
ⓘ
about 1.6 m ⓘ |
| maximumWeight | over 15 kg ⓘ |
| nativeTo |
Central African freshwater systems
ⓘ
Chad Basin ⓘ
linked to:
Lake Chad basin
Niger Basin ⓘ
linked to:
Niger River valley
Nile River basin ⓘ
linked to:
Nile Basin
West African freshwater systems ⓘ |
| order | Osteoglossiformes ⓘ |
| parentalCare | present ⓘ |
| phylum | Chordata ⓘ |
| preysOn |
fish
ⓘ
invertebrates ⓘ |
| reproduction | oviparous ⓘ |
| sensoryAdaptation |
enhanced electrosensory system
ⓘ
reduced reliance on vision ⓘ |
| swimmingMode | undulation of dorsal fin ⓘ |
| taxonRank | species ⓘ |
| uses |
electrocommunication
ⓘ
electrolocation ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Gymnarchus niloticus Description of subject: Gymnarchus niloticus, commonly known as the African knifefish, is a large, nocturnal, weakly electric fish native to the Nile and other African freshwater systems.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.