There is one particular scene in an ~80s Horror-Scifi movie I remember which has been very fascinating as a child. Now I'm looking for the movie title.
There is a flesh-colored, slimy worm crouching on and beneath the metal grid floor of some kind of space ship or boat. It is undiscovered by the crew at that time and the climax is already increasing in that scene. I think the worm is developing further in the movie.
I know there are many movies with latex monsters and worms similar to that. I recently watched "Galaxy of Terror" and "Leviathan" but couldn't find that particular scene.
EDIT: The worm had a length of maybe 15 cm and started crawling towards the crew. And I've been pretty sure, it was a space ship until I saw Leviathan which is placed several miles beneath the ocean surface.