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There are 2 species - the Western and Eastern gorillas, and both species have silverback males. The larger of the two is the Eastern Gorilla. The maximum size of a male gorilla can be over 225 kg (500 lb) and 1.83 m (6 ft) in the wild, with much heavier weights recorded in captivity. (Although I can't find a decent reference to the recorded sizes either.)
Lolong was the largest crocodile in captivity. He was an Indo-Pacific or saltwater crocodile (Crocodylus porosus) measured at 20 ft 3 in (6.17 m), and weighed 2,370 lbs (1,075 kg), making him one of the largest crocodiles ever measured from snout-to-tail.