How To Sex Red Head Tapajos?

[Glenbo1981]

Just wandering because I have 4 and they all look the same, except the biggest one is getting a bit of a hump on his head.

All 4 have red heads, the biggest one is 7", next is 6" and the other 2 are 3"

 

[Big_eyes]

Just wandering because I have 4 and they all look the same, except the biggest one is getting a bit of a hump on his head.

All 4 have red heads, the biggest one is 7", next is 6" and the other 2 are 3"

Sell them to me and I'll let you know once I find out

From what I understand of them, they are quite difficult to sex. The hump on its head may be a possibility that it's a male I suppose. Didn't think that these had humps though

 

[Glenbo1981]

Neither did i but then most Male cichlids tend to get a bit of a hump, just some more extreme than others.