Duckhead Knife

[HugeGhost]

Does anybody know if this is the same fish but male and female? I am thinking these are different?
Duckhead and Dragon are they the same knife?

 

[Bsixxx]

damn that thing looks beast



and ya I think there the same

 

[aranos]

To my knowledge parapteronotus hasemani exhibits the largest sexual dimorphism of all the knives. So much so that male specimens were described as a whole new species (apteronotus anas). For more info see the articles listed below.


COX FERNANDES,, J. G. LUNDBERG, AND C. RIGINOS. 2002. Largest
of all electric-fish snouts: hypermorphic facial
growth in male Apteronotus hasemani and the
identity of Apteronotus anas (Gymnotiformes: Apter-
onotidae). Copeia 2002:52–61.

ALBERT, J. S. 2001. Species diversity and phylogenetic
systematics of American knifefishes (Gymnotiformes,
Teleostei). Misc. Publ. Mus. Zool., Univ.
Michigan 190:1–127.

 

[wintervixen]

I think duck knives are beautiful creatures. Odd looking yes almost grosteque but so beautiful.

 

[moxxommox]

Quack quack! that's crazy!

 

[Red Devil]

he is awesome, is he yours? more pics..

 

[HugeGhost]

To my knowledge parapteronotus hasemani exhibits the largest sexual dimorphism of all the knives. So much so that male specimens were described as a whole new species (apteronotus anas). For more info see the articles listed below.


COX FERNANDES,, J. G. LUNDBERG, AND C. RIGINOS. 2002. Largest
of all electric-fish snouts: hypermorphic facial
growth in male Apteronotus hasemani and the
identity of Apteronotus anas (Gymnotiformes: Apter-
onotidae). Copeia 2002:52–61.

ALBERT, J. S. 2001. Species diversity and phylogenetic
systematics of American knifefishes (Gymnotiformes,
Teleostei). Misc. Publ. Mus. Zool., Univ.
Michigan 190:1–127.

Cool man perfect timing thanks bro

 

[wintervixen]

To my knowledge parapteronotus hasemani exhibits the largest sexual dimorphism of all the knives. So much so that male specimens were described as a whole new species (apteronotus anas). For more info see the articles listed below.


COX FERNANDES,, J. G. LUNDBERG, AND C. RIGINOS. 2002. Largest
of all electric-fish snouts: hypermorphic facial
growth in male Apteronotus hasemani and the
identity of Apteronotus anas (Gymnotiformes: Apter-
onotidae). Copeia 2002:52–61.

ALBERT, J. S. 2001. Species diversity and phylogenetic
systematics of American knifefishes (Gymnotiformes,
Teleostei). Misc. Publ. Mus. Zool., Univ.
Michigan 190:1–127.

Aranos, are you doing research on knives for a living? You seem to now so much scientific stuff about them and that is a good thing in this forum!

 

[rj0722]

wow......great knife dyde, looks wicked