The Marshes (2018)

Three young biologists venture into the isolated depths of a marshland to study its unique ecosystem. However, their scientific exploration takes a terrifying turn when they stumble upon a sinister, ancient force lurking in the shadows. Faced with a chilling threat, the trio must abandon their research and focus on survival, navigating both the treacherous terrain and the dark entity that preys on them. As their knowledge of biology becomes irrelevant, the struggle for life against an age-old evil unfolds, pushing their limits in a fight for survival.