If you loved U 2000 - Tauchfahrt des Grauens, try Die Brut des Teufels
Eine Brücke zwischen einem Film, den du schon gesehen hast, und einem, den kaum jemand kennt. Das teilen sie, und was der zweite macht, was der erste nicht macht.
Was sie teilen
Both films are directed by Ishirō Honda, and they sit in Action / Science Fiction territory. If that's the register that drew you to U 2000 - Tauchfahrt des Grauens, the second film will land in a comparable space — through a different lens.
What Die Brut des Teufels is
You pilot a sub to the ocean floor, scavenging wreckage. But a living dinosaur guards it. Interpol eyes a disgraced scientist, plus his daughter. Her allegiance with aliens resurrects a weapon. Honda's last Godzilla film balances camp with genuine pathos. It lingers in the mind.
Ask 
ChatGPT
Claude
Grok
Le Chat
Perplexity
for a deeper bridge
ChatGPTClaudeGrokLe ChatPerplexity