pa4210842 freshwater triclad flatworm, girardia tigrina, feeding on a fruit fly, on black, cecp 2023

planaria triclad girardia tigrina planarian platyhelminthes turbellaria tricladida dugesiidae flatworm worm freshwater aquatic animal north america british columbia close closeup brown black fauna natural detail predator nature wild macro isolated invertebrate creeks streams spings white eyes eyespots flatworms benthic water uncommon unusual flat invasive feeding fruit fly pa4210842 cecp 2023 backlit darkfield transparent dead drosophila hydei three branches gut red