Is it really a Banjo / Bunocephalus?

[Tetraodon]

My first Banjo cat fit the species descriptions and images of Bunocephalus coracoideus , and admittedly since getting more I've not been able to tell who's who, so I wouldn't know whether I've seen him recently (I see the girls more often) - however, my newer additions didn't fit the description/images at all in terms of colour. The whole body is a light brown, with no bi-colouration (which kinda appears to be one of the main definitions of the species' name).

Original:




However, the more recent additions (I say more recent, I've had them for almost a year - I just haven't gotten around to checking their species )





I've never seen their colours change. Could this be B coracoideus changing colour to suit the environment (a light beach/river sand), or are they likely to be a different species? I noticed Pseudobunocephalus amazonicus looked very similar, but the only images I can find are of one source - so I'm not sure how accurate it is.

Any thoughts?

[Bas Pels]

Not familiar with banjo catfishes, I would assume the new fish is another species of Banjo catfish. Whether Bunocephalus or not - I have no idea, but I would assume it is a fish of the same family

[catfishchaos]

Pseudobunocephalus amazonicus

is what I would go with @Tetraodon