I was looking in my tanks lastnight and for a moment had a heart stopping shock , one of my new little Pakastani loaches was on its side on one of its favourite rocks looking for all the world DEAD . Then I remembered that they do like sleeping on their sides and sure enough he woke up for a second sat (?) up normally before settling back down to finish his snooze . It was so cute (felt like tucking him in with a little fishie blanket ) I even got the other half out to see him doing it, it was the first time I had seen any of my loaches go to sleep this way.