Animals That Start With O
Discover 2 animals whose common name begins with the letter O, from Bornean Orangutan to Common Octopus. Browse photos, taxonomy, habitat, diet, and conservation status for each species.
O Animals
Bornean Orangutan
Pongo pygmaeus
MammalThe Bornean orangutan is a critically-endangered great ape found only on the island of Borneo, spending nearly its entire life moving through the rainforest canopy.
Common Octopus
Octopus vulgaris
Marine AnimalThe common octopus is a remarkably intelligent, boneless marine invertebrate found in coastal waters worldwide, renowned for its problem-solving abilities and rapid camouflage.
Alphabetical List
Interesting O Animal Facts
- Bornean Orangutan: Orangutans build a new nest of branches and leaves to sleep in every single night.
- Common Octopus: An octopus has three hearts and blue, copper-based blood.
O Animals FAQs
How many animals start with the letter O?
This page currently features 2 animals whose common name starts with O, and more are added regularly.
What is the most popular animal starting with O?
Common Octopus is the most popular animal starting with O on this site.
What is the rarest animal starting with O?
Bornean Orangutan has the most severe conservation status (Critically Endangered) among animals starting with O.
Are any animals starting with O endangered?
Yes — 1 animal starting with O is classified as vulnerable, endangered, or critically endangered.