That would be exactly what I would expect. You are probably expecting them to be like the large groups of fish with no hiding spaces in the shops.... They don't, unless you keep them in quite large goups. If you have a LARGE group of them (10 or more), it may be a different story. I had a group of ...

I have three Pictus Catfish in a 100 gallon aquarium (ammonia levels 0ppm, nitrite 0ppm, nitrate 20ppm). They have a huge run of the tank, a lot of hiding spaces and are generally in (what I believe to be) a great set-up. However all three hide ALL day/night long. There may be a single occasion in ...