The movement or directional response of organisms to changes in pressure, either moving toward or away from certain pressure conditions.
From Greek 'baros' (pressure/weight) + 'taxis' (arrangement/movement). This biological term emerged in late 19th-century zoology and microbiology to describe pressure-related organism behavior.
Fish and bacteria use barotaxis to navigate their world—some are attracted to high pressure (piezophiles living in ocean trenches), while others avoid it, and this pressure-sensing ability is as important to them as our sense of touch is to us.
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