My otocinclus catfishes just sit around and do nothing all day, are they sick?
Sometimes otocinclus do not feel safe out in the open during the day, and only are active at night. This matches how most Loricarids behave. Only until they are used to their surroundings do they begin staying out in the open for long periods of time. It would be rare to find all your otos out in the open, however, as most fishkeepers report it being impossible to count all the otos you have in a tank, because some are almost always hidden at any given point. Makes for a good reason to buy them in large groups!
