It could have been made more refined. Sharks that growl like lions, plot misses which transform the war against the surface dwellers into an intestine mayhem with simplistic bad vs good , escaping from a underwater city in which the city cannons fire internally and having a mamma Mia like scene of Sicily really didn't appeal to me. Jasos Momoa interpretation was good thou as opposed to the black mamba's interpretation. (Couldn't he have waited for some water to enter the submarine to then pull out his dad? Was that the best they could come up with?)