It Came from Beneath the Sea (1955)

An American science fiction directed by Robert Gordon with special effects by Ray Harryhausen.
A radioactive, giant octopus is sinking ships. A team of scientists are called in to analyze a piece of it that was stuck to a nuclear submarine.
Standard, boring, mediocre. The plot was sub-par and featured the standard giant monster attack characters. The video that I saw was a colorized version of unknown date. Why did I watch this? Harryhausen's monster, of course! Turns out the monster only had six tentacles. There was some good compositing with live action people running past a stop motion animated tentacle that was breaking a wall. I think the pictured scene inspired the giant octopus in Katamari Damacy (PS2). Overall, sub-par. Don't even bother watching it for the octopus. I rate this poor.