A common inhabitant of the littoral region in lakes and other small bodies of water. It is most frequently found in association with vegetation though occasionally will be found on bare rocky shores or sand (1).
Acroperus harpae is an active species that can swim rapidly as well as crawl. Crawling is achieved through the use of the first trunk limbs with the dorsal crest on the headshield and carapace providing stability. When settled on its ventral margin the long antennae are extended posteriorly and act as props for balancing (1).
(1) FRYER, G. 1968. Evolution and adaptive radiation in the Chydoridae (Crustacea: Cladocera): a study in comparative functional morphology and ecology. Philos. Trans. R. Soc. Lond., B, Biol. Sci. 254: 221-382 + 384-385.