Need help IDing goonch

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Bagarius and yarrelli are the 6' plus giants. Indochina I believe is the next biggest around 4'. Rutilus and suchus are the 3' but smaller in aquariums. The dwarves are 8".
 
Thank you very much.

But to be honest, the only one i could really tell apart for shure based on this picture would be B.Suchus because its so flat. If the long ends on the rear fins are clear indicators, that would be conveniant too, since the colour might always differ, and without the colour, this sp. indochina looks like the rest for me.

Only thing i can guess to tell yarelli and rutilus apart would be the more dominant upper jaw on the rutilus, so it looks a bit more like a sucking catfish on the picture .. but i would not be tmoney on such a detail.

Maybe someone knows more about the specific regions or rivers where each species is the most dominant, this would be helpfull i guess.

Greetings
 
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