What is biofouling? Biofouling is the adhesion and accumulation of biological material - protein, biofilm, bacteria, algae, plants, and animals - on wet surfaces. Biofouling can cause functional deficiencies and antifouling is the ability of materials or coatings to prevent, minimize, or remove biofouling. In marine vessels biofouling has been seen to increase the fuel consumption up to 40%. VideometerLab and Videometer Multiray measures biofouling - rapidly and easily VideometerLab and Videometer Multiray instruments are extremely versatile in assessing chemical and physical heterogeneity on a surface, and for biofouling surfaces we can generate abundance maps of algae based on color, spectral reflectance, chlorophyll A fluorescence, chlorophyll B fluorescence, UV fluorescence, and fluorescence yield. In addition to this we can used algal morphology and texture. Multiray imaging provides a fast and robust way to asses microtopography in the initial growth phases. Barnacles and traces of barnacles are also seen. Check out the examples in the biofouling presentation.