The Tag-Along: Devil Fish (2018)

Plot

A spirit medium faces an unexpected challenge when summoned to expel a demon from a troubled man. Unbeknownst to him, two students are recording the exorcism, and their interference leads to the accidental release of the malevolent devil fish demon. With chaos unleashed, the medium teams up with the students to confront this formidable entity and return it to its infernal realm. As they navigate the terrifying consequences of their actions, they must find a way to contain the demon before its wrath devastates the world around them.