 ODESSABARBE Pethia padamya |  |
 OHRGITTER- HARNISCHWELS Otocinclus hoppei |  |
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 OHRGITTER- WELS Otocinclus macrospilus |  |
 OPAL- APISTOGRAMMA Apistogramma... |  |
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 ORANGE- BUSCHFISCH Microctenopoma... |  |
 ORANGEFLOSSEN- PANZERWELS Corydoras sterbai |  |
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 ORANGEN- HECHTBUNTBARSCH Crenicichla sp. Xingu I |  |
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 ORANGESAUM- PRACHT- HARNISCHWELS, L18 |  |
 OSKAR Astronotus ocellatus |  |
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