The Agusan Marsh Wildlife Sanctuary is a protected area in Agusan del Sur, Philippines declared by President Fidel V. Ramos. The marshland acts like a sponge, as it is nestled in the midwaters of the Agusan River drainage basin. Within its lakes, several floating communities can be found. The sanctuary was home to the 20.24 feet saltwater crocodile …The Agusan Marsh Wildlife Sanctuary is a protected area in Agusan del Sur, Philippines declared by President Fidel V. Ramos. The marshland acts like a sponge, as it is nestled in the midwaters of the Agusan River drainage basin. Within its lakes, several floating communities can be found. The sanctuary was home to the 20.24 feet saltwater crocodile Lolong, the world's largest captive crocodile.