All aquarium fish on letter O

Orange Lined Cardinalfish Apogon cyanosoma more photo (sea) colors: striped more information	Orange Spotted Shrimp Goby Amblyeleotris guttata more photo (sea) colors: spotted more information	Ocellaris Clownfish Amphiprion ocellaris more photo (sea) colors: striped more information
Orange-Banded Coralfish Coradion Chrysozonus more photo (sea) colors: striped more information	One Spot Blenny Crossosalarias macrospilus more photo (sea) colors: spotted more information	Orangebuschfisch Ctenopoma ansorgii more photo (freshwater) colors: striped more information
One Spot Foxface Siganus unimaculatus more photo (sea) colors: yellow more information	Orchid Dottyback Pseudochromis fridmani more photo (sea) colors: purple more information	Otocinclus vittatus Otocinclus vittatus more photo (freshwater) colors: striped more information
Ornate Bichir Polypterus ornatipinnis more photo (freshwater) colors: spotted more information	Orangetail Dottyback Pseudochromis coccinicauda more photo (sea) colors: motley more information	Orange face butterflyfish Chaetodon larvatus more photo (sea) colors: white more information
Ocellate river stingray Potamotrygon motoro more photo (freshwater) colors: spotted more information	Orangeshoulder Tang Acanthurus olivaceus more photo (sea) colors: yellow more information	Orange chromide Etroplus maculatus more photo (freshwater) colors: gold, spotted more information