Fig. 4

Transmission electron micrographs depicting representative viral like particles (VLPs) associated with coral reef sponges. Representative tailed VLPs in Stylissa carteri (a, c) and Amphimedon ochracea (b); non-tailed icosahedral VLPs in Pipestela candelabra (d) and Cinachyrella schulzei (e); filamentous VLP from Cinachyrella schulzei (f); Geminate VLPs from Amphimedon ochracea (g); lemon-shaped VLP from Carteriospongia foliascens (h) and brick-shaped VLP from Crella cyathophora (i); using the TEM preparation methods: sponge sections (i) CsCl gradient separation (d, g) and from surface mucus (a-c, e-f, h). Scale bar = 100 nm. Arrow in Fig. 4a denotes the presence of a capsid tail structure