Fig. 7. Confocal microscope pictures of coelomocytes from coelomic fluid and cells from coelomic epithelium explants of A. rubens taken after 30 min incubation with FITC-labelled yeast (green). (A,C,E) Coelomocytes in different dilutions in filtered seawater (FSW) (A, low; C, medium; E, high density). High density is the cell density of undiluted coelomic fluid. (B,D) Cells from coelomic epithelium (explant in FSW). In A and B there is no clear network formation; in C and D there is evidence of network formation; in E there is clear network formation. Scale bars, 50 µm.