Petrocephalus species

Some species of elephant fish.

I agree, definitely a mormyrid, but no clue past that.

@Great Argus Not much info on many of the species, and many look alike.. I would just title it elephant fish ID tbh haha

Pollimyrus adspersus, commonly referred to as baby whale or round-nosed mormyrid in aquaculture.

Thank you all and esp. Zooish, Pollimyrus adspersus realy looks like the right one !

Did some more research in this one and it seems to be a member of the genus Petrocephalus, a genus containing 46 species of similar looking fish so will leave it Petrocephulus species.
A list of all species I found on the internet :
Petrocephalus ansorgii Boulenger, 1903
Petrocephalus arnegardi Lavoué & Sullivan, 2014
Petrocephalus balayi Sauvage, 1883
Petrocephalus bane (Lacépède, 1803)

• Two subspecies:

P. b. bane (Lacépède, 1803)
P. b. comoensis de Merona, 1979

Petrocephalus binotatus Pellegrin, 1924
Petrocephalus boboto Lavoué & Sullivan, 2014
Petrocephalus bovei (Valenciennes, 1847)

• Two subspecies:

P. b. bovei (Valenciennes, 1847)
P. b. guineensis Reizer, Mattei & Chevalier, 1973

Petrocephalus catostoma (Günther, 1866)
Petrocephalus christyi Boulenger, 1920
Petrocephalus congicus David & Poll, 1937
Petrocephalus cunganus Boulenger, 1910
Petrocephalus degeni Boulenger, 1906
Petrocephalus frieli Lavoué, 2012
Petrocephalus gliroides (Vinciguerra, 1897)
Petrocephalus grandoculis Boulenger, 1920
Petrocephalus haullevillii Boulenger, 1912
Petrocephalus hutereaui (Boulenger, 1913)
Petrocephalus keatingii Boulenger, 1901
Petrocephalus leo Lavoué, 2016
Petrocephalus levequei Bigorne & Paugy, 1990
Petrocephalus longianalis Kramer, Bills, Skelton & Wink, 2012
Petrocephalus longicapitis Kramer, Bills, Skelton & Wink, 2012
Petrocephalus magnitrunci Kramer, Bills, Skelton & Wink, 2012
Petrocephalus magnoculis Kramer, Bills, Skelton & Wink, 2012
Petrocephalus mbossou Lavoué, Sullivan & Arnegard, 2010
Petrocephalus microphthalmus Pellegrin, 1909
Petrocephalus odzalaensis Lavoué, Sullivan & Arnegard, 2010
Petrocephalus okavangensis Kramer, Bills, Skelton & Wink, 2012
Petrocephalus pallidomaculatus Bigorne & Paugy, 1990
Petrocephalus pellegrini Poll, 1941
Petrocephalus petersi Kramer, Bills, Skelton & Wink, 2012
Petrocephalus pulsivertens Lavoué, Sullivan & Arnegard, 2010
Petrocephalus sauvagii (Boulenger, 1887)
Petrocephalus schoutedeni Poll, 1954
Petrocephalus similis Lavoué, 2011
Petrocephalus simus Sauvage, 1879
Petrocephalus soudanensis Bigorne & Paugy, 1990
Petrocephalus squalostoma (Boulenger, 1915)
Petrocephalus steindachneri Fowler, 1958
Petrocephalus stuhlmanni Boulenger, 1909
Petrocephalus sullivani Lavoué, Hopkins & Kamdem Toham, 2004
Petrocephalus tanensis Whitehead & Greenwood, 1959
Petrocephalus tenuicauda (Steindachner, 1894)
Petrocephalus valentini Lavoué, Sullivan & Arnegard, 2010
Petrocephalus wesselsi Kramer & van der Bank, 2000
Petrocephalus zakoni Lavoué, Sullivan & Arnegard, 2010