Thiomargarita magnifica

Largest known bacteria species

Candidatus Thiomargarita magnifica is a species of sulfur-oxidizing gammaproteobacteria, found growing underwater on detached leaves of red mangroves from the Guadeloupe archipelago in the Lesser Antilles. This filament-shaped bacteria is the largest known bacterium, with an average length of 10 mm and some individuals reaching 20 millimetres (0.79 in), making the bacteria visible to humans by unaided eye.

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