What are some rare colors of common animals that exist that most people aren't aware of?

The Akhal-Teke, a beautiful russian breed of horses, has a fur with metallic shines: Akhal-Teke.

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• There are not green mammals, only Sloths show greenish patches in their backs due to algae in their fur. Sloth fur has symbiotic relationship with green algae.

Many cephalopods are actually bioluminiscents (Bioluminescence)

albino dolphins are pinkish due to the extreme irrigation of their fat.

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