The larvae of dragonflies squirt water out their anuses to lunge forward after prey thanks to hydraulic linkages.

References

"Hydraulic linkages occur in a wide variety of biological systems…In addition, one can point to the predatory strike of dragonfly larvae, which lunge forward by squirting water out their anuses (Tanaka and Hisada 1980)…" (Vogel 2003:420-421)

Book
Comparative Biomechanics: Life's Physical World, Second EditionMay 24, 2017
Steven Vogel

Journal article
The hydraulic mechanism of the predatory strike in dragonfly larvaeJournal of Experimental BiologyJanuary 1, 1970
Tanaka, Y; Hisada, M

Living System/s

Organism
Holarctic SpringflyAnisopteraSpecies