A drone view shows tourists sitting on transparent boats beside a whale shark as a guide swims nearby carrying bait at Botubarani Beach in Bone Bolango Regency. (Reuters pic)GORONTALO: Passengers gasp in delight as Ansar Lasimpala, 47, manoeuvres his glass-hulled boat towards the large, dark shadow of a whale shark gliding under the waters off an Indonesian beach.

Once a backwater where fishing was the only source of income, Ansar's village of Botubarani has turned into a tourism destination for those keen to interact with the whale sharks, which are the world's largest fish species.

"I have a more relaxed job now and the income is fairly good," said Ansar, after feeding the whale sharks with shrimp on the beach.