It is a 1st class municipality in the province of Sorsogon, Philippines.

According to the 2007 census, it has a population of 43,996 inhabitants.

Donsol is a popular tourist destination for the whale sharks that can be seen in the bordering seas. Swimming with whale sharks was featured as the Best Animal Encounter in Asia by Time Magazine in 2004. Whale sharks can be seen between November and June, with presence peaking between February and May.

 

The presence of whale Sharks in the town of Donsol was known to the local residents over 100 years. But the locals believed these gentle giants where sharks and dangerous. This wrong notion changed when in January 1998, a group of scuba divers led by Romir Aglugub – a PADI diving instructor, discovered its presence, and interacted and came in contact with the Whale Sharks. Even the members of the diving group of Romir was having second thought if the fish is docile, until the instructor led the way into the water and came in contact with the whale shark. Copy of video footage taken by the group was passed on to the media and the WWF-Philippines. The original amateur video is on file by the Instructor as proof of the first video recording of the Discovery. By March 1998, Donsol became world-class tourist destination and now known as the “Whale Shark Capital of the World”. 

 

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Source:

Wikipedia.org