Yeti crabs (Kiwa puravida) set to the music of Men Without Hats "The Safety Dance".
To learn more about this behaviour: Thurber AR, Jones WJ, Schnabel K. 2011. Dancing for food in the deep sea: bacterial farming by a new species of yeti crab. PLoS ONE 6(11): e26243. DOI:10.1371/journal.pone.0026243