I wanted to see this thing in motion, so I tried to search up the youtube video, but no dice. Every article on it is just copy-pasted from the original on the Express site, and I can’t get the embedded video attached to it to work. I did find an article on NIWA’s site about a species of sea pig, which looks similar.
I would add The Addams Family (1991) and Addams Family Values (1993) to your Funny and Spooky list. I’ll also second the The Fog (1981) suggestion.