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. 2018 Mar 27;4:7. doi: 10.1038/s41522-018-0050-9

Fig. 1.

Fig. 1

Visualization of biofilms on the inner surface of bath toys. a The inner surface of a bath toy used under real conditions. b Optical coherence tomography image of the biofilm structure and thickness of the same bath toy (scale bar: 50 µm). c Scanning electron microscopy image revealing the complex structure and composition of these bath toy biofilms. Colors were added artificially to draw attention to varied structures (scale bar: 2 µm). For additional images, see supplementary information