hen asked by Allan to write the 100th information sheet for the site, I felt honoured and thought that I would write
about a fairly straightforward catfish! How wrong could I be, firstly the little beast that I am keeping in the fish house has changed its name from Hemibagrus nemurus to Hemibagrus wyckioides, and reading a little more about this fascinating catfish I find that it can attain lengths up to 950mm or 38”!. So how did I end up with this catfish I here you ask?. I was shown a listing of fish that were available from a wholesaler and knowing that a good friend of mine, Daphne Layley, had previously asked me to look out for a Hemibagrus wyckii, I duly ordered two specimens to be collected the following week. I arrived at the shop to collect the fish as planned to find from quite a distance (I was at least ten feet away from the tank that the bag was floating in) that there were not two H. wyckii as expected but two of what I thought were H. nemurus (now H. wyckioides)!, I must admit to being more than a little disappointed at the time but took the fish anyway.

I have to say that this is a catfish full of character, but one that is also purely evil. It looks at you as if butter would not melt in its mouth, but turn your back and it is probably the most mischievous fish that I have had the pleasure to keep recently. This catfish is constantly rearranging the décor in the tank, one day the aquarium sand (BD Aquarium Sand) is piled up against one end of the tank the next you cannot see through the front glass! This catfish will eat literally anything that I care to feed it ranging from earthworms, cockles, prawns, mussels etc to catfish pellets and floating food sticks. In some respects I will be sad to see the fish go but I know that it will have much larger accommodation than I can provide for it at present. As most of you reading this will realise this catfish is not one to be taken lightly, and is not one for the novice fish keeper.

Anyway I digress, back to the confusion over the naming of this catfish. Those of you who surf the web will no doubt have come across many sites listing or referring to our favourite subjects “Catfish”, this is where some of the confusion certainly on my part sets in. My first encounters with this catfish (too many years ago to remember now), were when I saw the odd specimen in a retailers tank labeled up as Mystus nemurus, how things have changed. At one time these catfish were compared to the Red tailed catfish – Phractocephalus hemioliopterus “The Emperor of the Amazon” as being the poor man’s cousin. At the time it was thought that H. wyckioides only grew to around 300mm or 12” how naive we were. As the years have passed by this catfish has seen some name changes from Mystus nemurus to Hemibagrus nemurus (or so we thought), to what we now know as Hemibagrus wyckioides; hence the confusion! To further add to this confusion Hemibagrus nemurus is a valid species but differs from Hemibagrus wyckioides in that it does not posses the red coloured tail and has a more flattened head, shorter adipose fin and filamentous extensions to the dorsal and caudal fin rays.

In its natural habitat H. wyckioides is found at irregular depths usually over rocky substrates in large upland rivers. It is documented that this catfish reproduces in its local environment and enters the flooded forest during the high water season which is usually between July and October. It is a predator feeding upon a diet that includes prawns, insects, fish and crabs in its natural habitat. As with all large species of catfish (or any other fish for that matter) good water quality and general aquarium husbandry are paramount to the successful keeping of this fish. Water changes should be performed at least weekly to maintain good water quality. This catfish prefers good water movement which can usually be provided by using adequately sized external and or internal power filtration. Finally it is described as being the largest bagrid in Asia reaching weights of up to 80kg!