Solitary entoprocts living on bryozoans - Commensals, mutualists or parasites?

► Suspension-feeding solitary entoprocts inhabit the surface of bryozoan colonies. ► Spatial distribution of epibionts matched that of feeding polypides. ► Diets of Loxosomella nordgaardi and Tegella armifera partly overlapped. ► Presence of epibionts had no effect on size spectrum and amount of host's food. ► L. nordgaardi appeared to be commensal of T. armifera