So, the story is decent. They tried to make it more than just a shark attack film with some mythological aspects that were fairly interesting. They really needed to show what happened before the oil company family shows up. Seem like a budget constraint problem in that regard. Even with a small cast they could have pulled it off but for 2 of they actors. The husband and wife just killed the film for me. It's like they were trying to outdo each other in the emote department. They flip from one emotional extreme to another in mid sentence. So over the top that it just brought the whole film to it's knees. The rest of the cast's performances were fine. You can skip this one.
Review of The Black Demon
