Fish Identification: Find Species


Family: Gymnotidae Naked-back knifefishes



(See list of species below)


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45 species (see list below)
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Photo by Holm, E.

South America
Max. Length 250 cm SL
Electrophorus electricus (Linnaeus, 1766)

Photo by Photo by Holm, E.
 
Electrophorus electricus
[Electric eel]
No picture found

Max. Length 148.5 cm TL
 
Electrophorus varii
[]
No picture found

Max. Length 171.1 cm TL
 
Electrophorus voltai
[]

Photo by Holm, E.

South America
Max. Length 30 cm SL
Gymnotus anguillaris Hoedeman, 1962

Photo by Photo by Holm, E.
 
Gymnotus anguillaris
[]
No picture found

Max. Length 55 cm TL
 
Gymnotus arapaima
[]
No picture found
 
Gymnotus ardilai
[]
No picture found

Max. Length 27.6 cm TL
 
Gymnotus bahianus
[]
No picture found

Max. Length 17.9 cm TL
 
Gymnotus capanema
[]
No picture found

Max. Length 15.8 cm TL
 
Gymnotus capitimaculatus
[]

Photo by Landines, M.

Central and South America
Max. Length 76 cm TL
Gymnotus carapo Linnaeus, 1758

Photo by Photo by Landines, M.
 
Gymnotus carapo
[Banded knifefish]

Photo by JJPhoto

South America
Max. Length 31.6 cm TL
Gymnotus cataniapo Mago-Leccia, 1994

Photo by Photo by JJPhoto
 
Gymnotus cataniapo
[]
No picture found

Max. Length 27.5 cm SL
 
Gymnotus chaviro
[]
No picture found

Max. Length 24.3 cm TL
 
Gymnotus chimarrao
[]
No picture found

Max. Length 26 cm TL
 
Gymnotus choco
[]
No picture found

Max. Length 30 cm TL
 
Gymnotus coatesi
[]

Photo by Schönherr, K.

South America
Max. Length 34.5 cm SL
Gymnotus coropinae Hoedeman, 1962

Photo by Photo by Schönherr, K.
 
Gymnotus coropinae
[]
No picture found

Max. Length 30.5 cm TL
 
Gymnotus cuia
[]
No picture found

Max. Length 23.5 cm TL
 
Gymnotus curupira
[]

Photo by Molina, A.

Central America

Gymnotus cylindricus La Monte, 1935

Photo by Photo by Molina, A.
 
Gymnotus cylindricus
[]
No picture found

Max. Length 15.7 cm TL
 
Gymnotus darwini
[]
No picture found

Max. Length 12.5 cm TL
 
Gymnotus diamantinensis
[]
No picture found

Max. Length 30.9 cm TL
 
Gymnotus esmeraldas
[]
No picture found

Max. Length 31.2 cm SL
 
Gymnotus henni
[]

Photo by Equipe de Ictiologia do Nupélia

South America
Max. Length 99.8 cm TL
Gymnotus inaequilabiatus (Valenciennes, 1839)

Photo by Photo by Equipe de Ictiologia do Nupélia
 
Gymnotus inaequilabiatus
[]
No picture found

Max. Length 12.1 cm TL
 
Gymnotus interruptus
[]
No picture found

Max. Length 20.1 cm TL
 
Gymnotus javari
[]
No picture found

Max. Length 13.5 cm TL
 
Gymnotus jonasi
[]

Photo by Molina, A.

Central America.

Gymnotus maculosus Albert & Miller, 1995

Photo by Photo by Molina, A.
 
Gymnotus maculosus
[Spotted knifefish]
No picture found

Max. Length 24.3 cm TL
 
Gymnotus mamiraua
[]
No picture found

Max. Length 10 cm TL
 
Gymnotus melanopleura
[]
No picture found

Max. Length 21.5 cm TL
 
Gymnotus obscurus
[]

Photo by Albert, J.S.

South America
Max. Length 28.6 cm TL
Gymnotus omarorum Richer-de-Forges, Crampton & Albert, 2009

Photo by Photo by Albert, J.S.
 
Gymnotus omarorum
[]
No picture found

Max. Length 12 cm TL
 
Gymnotus onca
[]
No picture found

Max. Length 23.6 cm TL
 
Gymnotus panamensis
[]

Photo by Equipe de Ictiologia do Nupélia

South America
Max. Length 26 cm TL
Gymnotus pantanal Fernandes, Albert, Daniel-Silva, Lopes, Crampton & Almeida-Toledo, 2005

Photo by Photo by Equipe de Ictiologia do Nupélia
 
Gymnotus pantanal
[]

Photo by Sazima, I.

South America
Max. Length 23.6 cm TL
Gymnotus pantherinus (Steindachner, 1908)

Photo by Photo by Sazima, I.
 
Gymnotus pantherinus
[]

Photo by Equipe de Ictiologia do Nupélia

South America
Max. Length 24 cm SL
Gymnotus paraguensis Albert & Crampton, 2003

Photo by Photo by Equipe de Ictiologia do Nupélia
 
Gymnotus paraguensis
[]
No picture found

Max. Length 28.1 cm TL
 
Gymnotus pedanopterus
[]
No picture found

Max. Length 17.2 cm TL
 
Gymnotus refugio
[]
No picture found

Max. Length 14.2 cm TL
 
Gymnotus stenoleucus
[]

Photo by Sazima, I.

South America
Max. Length 42 cm SL
Gymnotus sylvius Albert & Fernandes-Matioli, 1999

Photo by Photo by Sazima, I.
 
Gymnotus sylvius
[]
No picture found

Max. Length 41.1 cm TL
 
Gymnotus tigre
[]

Photo by Maxime et al.

South America
Max. Length 24 cm TL
Gymnotus tiquie Maxime, Lima & Albert, 2011

Photo by Photo by Maxime et al.
 
Gymnotus tiquie
[Tiquie banded knifefish]
No picture found

Max. Length 19 cm TL
 
Gymnotus ucamara
[]
No picture found

Max. Length 28.5 cm TL
 
Gymnotus varzea
[]


Sort by: Species Length Year
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Scientific Name English Name Distribution Max. Length (cm) Year
Electrophorus electricus Electric eel South America 250 SL 1766
Electrophorus varii South America 148.5 TL 2019
Electrophorus voltai South America 171.1 TL 2019
Gymnotus anguillaris South America 30 SL 1962
Gymnotus arapaima South America 55 TL 2001
Gymnotus ardilai South America 2004
Gymnotus bahianus South America 27.6 TL 1996
Gymnotus capanema South America 17.9 TL 2012
Gymnotus capitimaculatus South America 15.8 TL 2014
Gymnotus carapo Banded knifefish Central and South America 76 TL 1758
Gymnotus cataniapo South America 31.6 TL 1994
Gymnotus chaviro South America 27.5 SL 2009
Gymnotus chimarrao South America 24.3 TL 2008
Gymnotus choco South America 26 TL 2003
Gymnotus coatesi South America 30 TL 1935
Gymnotus coropinae South America 34.5 SL 1962
Gymnotus cuia South America 30.5 TL 2018
Gymnotus curupira South America 23.5 TL 2005
Gymnotus cylindricus Central America 1935
Gymnotus darwini South America 15.7 TL 2019
Gymnotus diamantinensis South America 12.5 TL 2002
Gymnotus esmeraldas South America 30.9 TL 2003
Gymnotus henni South America 31.2 SL 2003
Gymnotus inaequilabiatus South America 99.8 TL 1839
Gymnotus interruptus South America 12.1 TL 2012
Gymnotus javari South America 20.1 TL 2003
Gymnotus jonasi South America 13.5 TL 2001
Gymnotus maculosus Spotted knifefish Central America. 1995
Gymnotus mamiraua South America 24.3 TL 2001
Gymnotus melanopleura South America 10 TL 2001
Gymnotus obscurus South America 21.5 TL 2005
Gymnotus omarorum South America 28.6 TL 2009
Gymnotus onca South America 12 TL 2001
Gymnotus panamensis Central America 23.6 TL 2003
Gymnotus pantanal South America 26 TL 2005
Gymnotus pantherinus South America 23.6 TL 1908
Gymnotus paraguensis South America 24 SL 2003
Gymnotus pedanopterus South America 28.1 TL 1994
Gymnotus refugio South America 17.2 TL 2016
Gymnotus stenoleucus South America 14.2 TL 1994
Gymnotus sylvius South America 42 SL 1999
Gymnotus tigre South America 41.1 TL 2003
Gymnotus tiquie Tiquie banded knifefish South America 24 TL 2011
Gymnotus ucamara South America 19 TL 2003
Gymnotus varzea South America 28.5 TL 2005



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cfm script by eagbayani, 30.11.04, ,  php script by cmilitante, 05/11/2010 ,  last modified by cmilitante, 14/03/2013