The fish, modelled after the Humpback Mahseer species, is made of various scrap materials but with two different themes on both sides.
People can walk through the huge metallic fish, where pictures taken by different wildlife photographers on fresh water conservation will be displayed.
But why Humpback Mahseer?
Humpback Mahseer, a native to Cauvery river, is a migratory fish.
After the festival, the 45-metre fish will be moved to BCC, where it will be displayed for around 100 days.