i looked in my tank and noticed that the ck as on its side laying on its side so i tapped the glass and it was back up and swimming, was it sleeping? i kno some fish look dead when they sleep do cks do the same
mine sleeps "tail up". Pretty neat looking actually. Straight up and down 90 degrees like. It worried me at first, but then I realized he has to be sleeping. He's a busy bugger at night, so most of the day he's snoozin.