Except when sleeping or feeding in their homes, flumphs constantly float in midair, their highly specialized method of flight allowing them to hover motionless when desired. As flumphs float through the air, they create a low, vibrating hum as thousands of pores like spiracles or stomata take in and release air in tiny jets, keeping the creatures aloft. A complex tracheal system maintains this gas exchange throughout the creatures' bodies, also aiding in their ability to deliver a noxious defensive spray of foul gasses and aerosolized acid at range. Though they float through the air, rarely touching the ground, flumphs are reliant on water for their life cycle, developing from larvae in an aquatic environment. Because of the world's relatively thin atmosphere, adult flumphs rarely grow beyond 3 feet in diameter, but the flumphs themselves insist that on worlds with denser atmospheric gasses, their size can double or even triple.