April 25 is celebrated as World Penguin Day.
12 Humboldt penguins live at Mumbai's zoo.
In 2016, three male and four female penguins were brought from Seoul, South Korea, to the Mumbai zoo.
Five new penguins have taken birth at the facility, raising the numbers to 12 from 7 since 2016.
The veterinary doctor at the zoo hints at a rise in the population of penguins.
Photographs curated by Manisha Kotian/Rediff.com
Feature Presentation: Rajesh Alva/Rediff.com
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