C. elegans in Complex Media
  We experimentally studied the locomotion of the nematode C. elegans in both fluidic and granular media. In this fluid dynamics video, we show the motility gaits of the nematode in these two environments. The motility of the nematode C. elegans is investigated using particle tracking methods. Experimental results show that different transport patterns emerge from the fluidic and granular media during the nematode locomotion. 
X. N. Shen, G. Juarez and P. E. Arratia
physics.flu-dyn physics.bio-ph