He spent his final years under observation and still holds the record for the largest crocodile ever recorded. Cassius – 17 ft 11 in (5.48 m) Credit: Wikimedia Commons ...

This crocodile barely blinks—but his size is impossible to ignore. Yai is a hybrid of saltwater and Siamese, and at nearly 20 feet long, he remains one of the biggest living reptiles in captivity.