Pretty much stayed in one place, rotating every few seconds. At one point, it began 'vibrating' very rapidly for about 10 minutes, and then resumed its turning behavior.
It has a 'Moustach', which remindes me of a Spirochaeta, but its behavior is different (as well as its shape).
Notice the two large circular objects, which I had originally thought were two nucleus, and perhaps the critter was getting ready to divide, but after about 20 mins. of observation, there was no change in its body structure.
