If you loved Frankenfish, try The Descent: Part 2
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the body horror mood tag, and they sit in Adventure / Horror territory. If that's the register that drew you to Frankenfish, the second film will land in a comparable space — through a different lens.
body horror
What The Descent: Part 2 is
Deep within Appalachian caves, a pickaxe lies still. A rescue team assembles, a traumatized Sarah descends again. Harris sustains the claustrophobic dread.

