The Tag-Along: Devil Fish

The Tag-Along: Devil Fish (2018) is a horror directed by David Chuang rated 4.9/10.

When a spirit medium is called to exorcise a demon from a possessed man, he is unknowingly captured in the act by two students looking to document the process. When the students accidentally release the devil fish demon into the world, it is up to them and the spirit medium to send it back to the hellish world from where it came.