I've actually had some experience with this catfish, it is often sold as a chocolate catfish, humbug catfish, raphael cat or a Dora (short for the family name)
I personally group them all as doras so for simplicities sake, dora it is!
Doras are shy, very shy and to make matters worse they are primarily nocturnal! Grouping them sometimes works, but i see my doras once in a blue moon. They feed really well, often eating to the point where they resemble ping pong balls with fins! They adore just about anything, but i find high protein foods gets them out.
Doras are tricky lil customers to deal with, some of the family grow in excess of three foot (megaladoras Irwinii springs to mind) but the dora you have described grows to around 14cm. They are really good at controlling snail populations as well, crushing them with their powerful jaws.
In self defence doras can erect their caudal and dorsal fins to extrme angles, presenting an attacker with a spiny mouthfull too big to handle, spotted doras even more so. Also, perculiar to the species, they can emit a loud grunting/rasping nosie when in this state, earning them thier nickname.
Doras as a whole are very peacefull, even the megaladoras can be kept with comparatively small tank mates. They are quick to hide, and i have kept, or known people keep them with loaches, bettas, synodontids, corydoras, cichlids, tetras and various large oddball fish. My doras are kept with several loach, four large synos and three plecos (two L numbered) hope this answers your questions
