Contains surviving characters from previous Syfy entries Trailer Park Shark (2017) and Atomic Shark aka Saltwater (2016). At 1:06:50, Ava finds a binder of their patient files and newspaper clippings referring to said movies.
A well known method actor, Thomas Ian Nicholas prepared for his dual roles (Nightmare Shark and Trailer Park Shark) by scuba diving with nurse sharks in the Gulf of Mexico. Many of his physical movements in both films mimic the swimming behavior of the nurse sharks.