If you loved Mothra, try Space Amoeba
A bridge between a film you've already seen and one most people haven't. Space Amoeba has roughly 3.4× fewer votes than Mothra — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Ishirō Honda, and they sit in Adventure / Science Fiction territory. If that's the register that drew you to Mothra, the second film will land in a comparable space — through a different lens.
What Space Amoeba is
Pacific atoll. Perpetual sunset. A smoking rocket. Parasitic aliens from the probe infect local wildlife. A cuttlefish balloons into Gezora. A turtle transforms to Ganimes. A crab mutates to Kamoebas. Honda presents an enjoyably rubbery latter-day kaiju throwdown.

