Synodontis Nigriventris vs Synodontis Contractus

Phantom Thief

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Well, what is the difference between Syno. Nigriventris and Syno. Contractus?

I have got 4 upside down catfish, but the pictures on the internet simply make me more confused. Could anyone tell me what is the difference between the two, and precautions i should take in case what i have is Contractus?

Thanks a bunch!
P.T.
 
S.contractus or as it is commonly known the big nosed upside down catfish is the smallest known synodontis species which only reached a maximum adult size of 2 1/2 inches. Other than the larger nose and smaller adult size there no difference between S.contractus and S.nigriventris.
 
yep, identical care for both species.
 

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