free-living
adjective
free-liv·ing
ˈfrē-ˈli-viŋ
1
: marked by more than usual freedom in the gratification of appetites
2
a
: not fixed to the substrate but capable of motility
a free-living protozoan
b
: being metabolically independent : neither parasitic nor symbiotic
a free-living adult hairworm
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Merriam-Webster unabridged
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