a crocodile sleeps with one eye open on a piece of land in a terrarium. the terrarium is illuminated with red-orange

animal zoo reptile terrarium nature wild sleep crocodile wildlife natural pet teeth tropical species skin one crocodiles mouth eye body captivity color habitat head sumatra tomistoma predator sleeping schlegelii reptilia large tomistominae indonesia only borneo alone life malayan gavialidae false creature malaysia crocodylia asia closeup green fauna gavial gharial