The seven Humboldt Penguins brought to Byculla zoo from South Korea have managed to increase the revenue 12-fold in the second half of 2017.
The zoo now makes up to ₹70 lakh a month after authorities hiked the entry fee in August 2017.
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In March 2017, the Penguins could be viewed by the people visiting the zoo and in August, the Brihanmumbai Municipal Corporation (BMC) hiked the zoo's entry fee from ₹5 an adult and ₹2 a child, to ₹50 an adult and ₹100 for a family of two adults and two children.
After the hike in the entry fee, the number of people visiting the zoo had gone down, but the revenue increased as the collection went up by ₹1 lakh on weekdays and twice as much on weekends.