floating thick brown ugly texture surface with bubbles on water surface

abstract air backdrop background bacteria bacterium biological biology brown bubble bubbles canal closeup colony culture filamentous film floating food fungal fungi fungus fuzzy growing growth health infection lab life liquid macro messy micro microbes microbiology microlife mildew mold moldy narrow natural nobody organic organism over pathway research rotten round science scientific skin small spores study substance supposed surface technology texture textured thailand thick tropical ugly under water wetland with wooden