Whoops, sorry about that. Yes, I agree that the second one is soloni . I am not sure about the first one, but camelopardalis is perhaps the more likely. Although to me, the humeral process and the adipose fin is more like a typical soloni , the colour pattern is more like a typical camelopardalis ...

I would say this fish is S. soloni. Firstly, there is a membrane at the base of the maxillary barbels which is present in soloni but not in carmelopardalis . The mandibular barbels look pretty much the same in both species. Secondly, the adipose fin appears to be relatively longer and not quite as ...

The previous replies all assume each character is determined by a single gene. Albinism frequently is in fish and therefore my best guess would be the same as the other replies. However, characters may be determined by more than one gene in which case things get more complicated. Several different ...

Just wondering what the pH of your tank is? It's a rather small tank and in a softwater area you could experience rapid changes in pH. In the past, I have experienced acidosis in naked catfishes as as result of this.

Callichthys are great fish. Well worth having if you come across them. I can confirm that the males develop the thickened first ray on the pectoral fins as they mature, so sexing at this stage is very easy.