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Chaetodon Imperator from Ichtylogie, ou Histoire naturelle: génerale et particuliére des poissons (1785–1797) by Marcus Elieser Bloch.
Dragonfly Anax imperator (female) Blue Emperor on a white background
An emperor dragonfly (Anax imperator) resting on a plant, sunny day in springtime, Vienna (Austria)
vector drawing snake, Boa constrictor imperator isolated at white background, hand drawn illustration
Emperor Angelfish juvenile fish isolated on white background

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