In June 2012, six months after Australian zoologist and crocodile expert Dr. Adam Britton gathered measurements, Lolong was officially certified by the Guinness Book of World Records as the "world's largest crocodile in captivity" at 6.17 m (20 ft 3 in).[15][16][17] Experts from the National Geographic Channel found out that Lolong breaks the record of the previous record-holder: a 5.48 m (18 ft 0 in) male saltwater crocodile named Cassius kept in the crocodile park of MarineLand Melanesia in Queensland, Australia. The certification was read in public during Bunawan's annual local festival, Araw Ng Bunawan (Bunawan Day).[18]