Definition of infauna in US English:



  • The animals living in the sediments of the ocean floor or river or lake beds.

    Compare with epifauna
    • ‘Bivalves first appeared during the early Cambrian as part of a shallow infauna.’
    • ‘High densities of organisms that bind the sediment and modify wave-induced erosion potential can also mitigate wave disturbance effects on other infauna.’
    • ‘In prior studies, we have argued that changes in sediment surface chemistry driven by biotic and physical disturbance affect recruitment decisions of infauna.’
    • ‘Reichardt found algal fragments on both sides of the Peninsula and suggested that algal material provided an additional carbon source to deep water benthic infauna.’
    • ‘These sediments are often bioturbated by an infauna that lived in them.’