| The filamentous red alga Audouinella sp. is an unwelcome guest in aquariums; here growing on the leafs of Bucephalandra sp. Further information on how this alga can be removed from the aquarium can be found here.  | 
									
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									  | Audouinella sp.; thallus with 3 sporangial laterals (arrow/ arrowheads). Two of them have already released the spores. | 
									
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										| Audouinella sp.; detail of the spore-containing cells. Although Audouinella si a red alga (Rhodophyta) the plastids of the algae of this sample have a more or less olive-green color. | 
									
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									  | Audouinella sp.; one of the sporangial laterals (arrowhead) with just released spore (arrow). Spores without flagella. | 
									
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										| Location: Aquarium | 
									
										| Habitat/ host: ??? | 
									
										| Date: 18.01.2025 | 
									
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