Videos: Watch cable bacteria in action

Cable bacteria emerge out of the sediment at the bottom of the video and crawl outwards in the search for oxygen. We use this behavior when we want to do experiments with single cable bacteria.


Although cable bacteria are too big a mouthful for an amoeba, it can bend the long cables in the middle and then eat them like spaghetti. The amoeba is eating all the bacteria giblets (= sucking out the cytoplasm) and then spitting out an empty sheath.


A close up of the area where cable bacteria meet oxygen. The cables writhe and twist as they try to get into the oxygen, which you can see as a fuzzy area. In the oxic area, a lot of ciliates are grazing on bacteria, though the cables are too big for them.


Normally ciliates eat bacteria, but here the tables have turned.  A ciliate has gotten caught in a loop made by a long cable bacterium t them, and is desperately trying to escape. Cable bacteria often move in such loop shapes, for reasons that are still unclear.