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Animals beginning with O

Browse the animals in the encyclopedia whose English names begin with O.

Silver-grey ocean sunfish with a tall flattened body and long top and bottom fins

Ocean sunfishMola mola

Ocelot with elongated black-bordered spots and rounded ears

OcelotLeopardus pardalis

octopus

OctopusOctopoda

AI illustration of an okapi with a brown body and striped hindquarters

OkapiOkapia johnstoni

opossum

OpossumDidelphimorphia; Didelphis virginiana is one species

orangutan

OrangutanPongo pygmaeus, Pongo abelii and Pongo tapanuliensis

orca

OrcaOrcinus orca

Large dark Oscar fish with orange patches and a red eye on a black background

Oscar fishAstronotus ocellatus

ostrich

OstrichStruthio camelus (common ostrich); Struthio molybdophanes is the Somali ostrich

otter

OtterLutrinae; Lutra lutra is the Eurasian otter, Lontra canadensis the North American river otter

owl

OwlStrigiformes