Commensal Acoel flatworms, Convolutrilobia retrogemma, on reef rock in an aquarium.

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Size: 4733px × 3168px
Photo credit: © Alf Jacob Nilsen / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: acoela, convolutidae, endosymbiose, endosymbiotic, epizoic, flatmark, flatworms, xenacoelomorpha