Black Water: Abyss is an Australian survival horror thriller about a group of friends exploring a remote cave system, only to become trapped underground with rising floodwaters and a deadly crocodile. Combining claustrophobic cave horror with creature-feature terror, it delivers tense survival stakes, isolation, and relentless monster menace.

Från IMDB:
Five friends exploring a remote cave system in Northern Australia find themselves threatened by a hungry crocodile.