Bonjours tous le monde,

Ils m'ont identifié les silures que j'ai acheté. Ce sont bien des Hexanematichthys seemanni.
D'après le vendeur (qui n'y connaissait rien visiblement) ils peuvent atteindre 30/35cm adulte et ont besoin d'une eau plutôt saumâtre.

J'ai un bac de 780L brute filtré par une ...

I think you are right, they are Hexanematichthys seemanni.

The body isn't not enough "argenté" to be Arius heudelotii from few pics i found on google.
There body are quiet dark grey, not too much, but grey without reflect.

I look many and read many description.

They are in a 780L tank with a big ...

Hello every body,

I bought those 3 catfish a week ago. The seller just can tell me that there are "spp."...
There are pretty nice, and quiet, no fight like pictus. They are very very all the time in group. If one go the other go with him.
There also very nice with the other fish in the tank and no ...