99		The Giant Behemoth (Drama, Fantasy, Horror, Sci-Fi, 1959)
86		Godzilla, King of the Monsters! (Action, Horror, Sci-Fi, 1956)
83		Reptilicus (Action, Horror, Sci-Fi, 1961)
72		Them! (Horror, Sci-Fi, 1954)
70		The Deadly Mantis (Horror, Sci-Fi, Thriller, 1957)
67		Forbidden Planet (Action, Adventure, Sci-Fi, 1956)
67		Pacific Rim (Action, Adventure, Sci-Fi, 2013)
67		Fantastic Four (Action, Adventure, Sci-Fi, 2005)
67		The Incredible Hulk (Action, Adventure, Sci-Fi, 2008)
65		Attack of the Crab Monsters (Horror, Sci-Fi, 1957)
64		Jurassic Park (Adventure, Sci-Fi, Thriller, 1993)
62		Jurassic World (Action, Adventure, Sci-Fi, 2015)
62		Species II (Action, Horror, Sci-Fi, 1998)
62		I Am Legend (Drama, Horror, Sci-Fi, 2007)
61		King Kong vs. Godzilla (Action, Adventure, Fantasy, Sci-Fi, 1962)
60		Sky Captain and the World of Tomorrow (Action, Adventure, Mystery, Sci-Fi, 2004)
59		Godzilla (Action, Sci-Fi, Thriller, 1998)
57		Jurassic Park III (Action, Adventure, Sci-Fi, 2001)
57		Godzilla vs. Destoroyah (Action, Horror, Sci-Fi, 1995)
57		Godzilla 1985 (Action, Horror, Sci-Fi, 1984)
57		Warlords of the Deep (Fantasy, Adventure, Sci-Fi, 1978)
57		Five Million Years to Earth (Horror, Mystery, Sci-Fi, 1967)
57		The Lost World: Jurassic Park (Action, Adventure, Sci-Fi, 1997)
55		Monsters vs. Aliens (Animation, Action, Adventure, Sci-Fi, 2009)
54		The Lost World (Adventure, Fantasy, Sci-Fi, 1960)
54		The Maze Runner (Action, Mystery, Sci-Fi, 2014)
53		Curse of the Faceless Man (Adventure, Horror, Sci-Fi, 1958)
52		20,000 Leagues Under the Sea (Action, Adventure, Sci-Fi, 1916)
52		The Creeping Flesh (Horror, Sci-Fi, 1973)
52		Godzilla (Action, Adventure, Sci-Fi, 2014)
52		Horror Express (Horror, Sci-Fi, 1972)
52		Nightmare City (Action, Horror, Sci-Fi, 1980)
52		The Thing (Horror, Mystery, Sci-Fi, 2011)
52		The Last Man on Earth (Horror, Sci-Fi, 1964)
50		The Twilight People (Adventure, Horror, Sci-Fi, 1972)
50		Dreamscape (Action, Adventure, Horror, Sci-Fi, 1984)
50		Mad Doctor of Blood Island (Adventure, Horror, Sci-Fi, 1968)
50		The Curse of Frankenstein (Horror, Sci-Fi, 1957)
50		It! The Terror from Beyond Space (Horror, Sci-Fi, 1958)
50		She (Adventure, Fantasy, Romance, Sci-Fi, 1935)
49		The Angry Red Planet (Adventure, Sci-Fi, 1959)
48		Varan the Unbelievable (Horror, Sci-Fi, 1962)
47		Beneath the Planet of the Apes (Action, Adventure, Sci-Fi, 1970)
47		Quarantine (Horror, Sci-Fi, Thriller, 2008)
47		Island Claws (Horror, Sci-Fi, 1980)
47		Prophecy (Sci-Fi, Horror, 1979)
45		The Blob (Horror, Sci-Fi, 1958)
45		Thor (Action, Adventure, Fantasy, Sci-Fi, 2011)
45		Godzilla vs. Biollante (Action, Drama, Horror, Sci-Fi, 1989)
45		Godzilla vs. Mechagodzilla II (Action, Adventure, Drama, Sci-Fi, 1993)
45		Mothra (Fantasy, Sci-Fi, Thriller, 1961)
45		Gojira: Fainaru uôzu (Action, Adventure, Fantasy, Sci-Fi, 2004)
45		Gojira tai Mosura tai Mekagojira: Tôkyô S.O.S. (Action, Adventure, Fantasy, Sci-Fi, 2003)
44		The Monster of Piedras Blancas (Horror, Sci-Fi, 1959)
44		The Manster (Horror, Sci-Fi, 1959)
44		Alien (Horror, Sci-Fi, 1979)
43		Hand of Death (Horror, Sci-Fi, 1962)
43		The Abominable Snowman (Adventure, Horror, Sci-Fi, 1957)
42		Invasion of Astro-Monster (Action, Adventure, Sci-Fi, 1965)
42		Resident Evil: Apocalypse (Action, Horror, Sci-Fi, 2004)
42		Ticks (Horror, Sci-Fi, 1993)
42		2019: After the Fall of New York (Action, Horror, Sci-Fi, 1983)
42		Rat Scratch Fever (Horror, Sci-Fi, 2011)
42		Alien: Resurrection (Action, Horror, Sci-Fi, 1997)
42		The Deadly Spawn (Horror, Sci-Fi, 1983)
42		Wonderland (Fantasy, Horror, Sci-Fi, 2011)
42		At the Earth's Core (Sci-Fi, Adventure, Fantasy, 1976)
42		Jumper (Action, Adventure, Sci-Fi, 2008)
42		The Return of Doctor X (Horror, Mystery, Sci-Fi, 1939)
42		The 5th Wave (Action, Adventure, Sci-Fi, 2016)
42		The Dinosaur Project (Adventure, Sci-Fi, 2012)
42		Man Made Monster (Drama, Horror, Sci-Fi, 1941)
42		Captain America: The First Avenger (Action, Adventure, Sci-Fi, 2011)
42		Metamorphosis: The Alien Factor (Horror, Sci-Fi, 1990)
42		The Crazies (Action, Horror, Sci-Fi, 1973)
42		Spring (Horror, Romance, Sci-Fi, 2014)
41		It Came from Beneath the Sea (Horror, Sci-Fi, 1955)
41		The Thing from Another World (Horror, Sci-Fi, 1951)
40		The Colossus of New York (Horror, Sci-Fi, 1958)
40		Attack of the 50 Foot Woman (Horror, Sci-Fi, 1958)
40		The Monster That Challenged the World (Horror, Sci-Fi, 1957)
40		Creatures the World Forgot (Adventure, Horror, Sci-Fi, 1971)
40		The Unknown Terror (Horror, Sci-Fi, 1957)
40		How to Make a Monster (Horror, Sci-Fi, 1958)
40		The Mask of Fu Manchu (Adventure, Horror, Sci-Fi, 1932)
40		Fiend Without a Face (Horror, Sci-Fi, 1958)
40		Segon origen (Adventure, Horror, Sci-Fi, 2015)
40		The Food of the Gods (Adventure, Horror, Sci-Fi, 1976)
40		Frankenstein 1970 (Horror, Sci-Fi, 1958)
40		Man-Thing (Action, Adventure, Horror, Sci-Fi, 2005)
40		Enemy from Space (Sci-Fi, Horror, 1957)
40		The Law (Adventure, Horror, Sci-Fi, 1992)
40		The Vampire (Horror, Sci-Fi, Thriller, 1957)
40		Paradise Cove (Adventure, Horror, Sci-Fi, 2008)
39		Aliens (Adventure, Sci-Fi, Thriller, 1986)
39		The Day the Earth Stood Still (Drama, Sci-Fi, Thriller, 2008)
39		Iceman (Drama, Sci-Fi, 1984)
38		Valley of the Dragons (Adventure, Fantasy, Sci-Fi, 1961)
38		Flight That Disappeared (Adventure, Fantasy, Sci-Fi, 1961)
38		Frankenstein (Drama, Horror, Sci-Fi, 1931)
38		House of Dracula (Fantasy, Horror, Sci-Fi, 1945)
38		Mjesto na kojem je umro posljednji covjek (Drama, Horror, Sci-Fi, 2010)
38		House of Frankenstein (Fantasy, Horror, Sci-Fi, 1944)
37		The Secret Adventures of Tom Thumb (Animation, Adventure, Sci-Fi, 1993)
37		Rabid (Horror, Sci-Fi, 1977)
37		Queen of Blood (Horror, Sci-Fi, 1966)
37		C.H.U.D. (Horror, Sci-Fi, 1984)
37		Night Shadows (Horror, Sci-Fi, Thriller, 1984)
37		The Kindred (Horror, Sci-Fi, Thriller, 1987)
37		Monkey Shines (Drama, Horror, Sci-Fi, 1988)
37		Thirst (Horror, Romance, Sci-Fi, 1979)
37		Willard (Horror, Sci-Fi, 1971)
37		Daybreakers (Action, Horror, Sci-Fi, 2009)
37		Beyond Atlantis (Fantasy, Horror, Sci-Fi, 1973)
37		When Dinosaurs Ruled the Earth (Adventure, Fantasy, Sci-Fi, 1970)
37		Swamp Thing (Horror, Sci-Fi, 1982)
36		The Beast of Hollow Mountain (Horror, Romance, Sci-Fi, 1956)
35		Gorath (Action, Sci-Fi, Thriller, 1962)
35		Not of This Earth (Horror, Sci-Fi, 1957)
35		Shadow Dancer: The Secret of Shinobi (Action, Adventure, Fantasy, Sci-Fi, 1990)
35		TMNT (Animation, Action, Adventure, Sci-Fi, 2007)
35		Atlantis: The Lost Empire (Animation, Action, Adventure, Sci-Fi, 2001)
34		Hulk (Action, Sci-Fi, 2003)
34		The Valley of Gwangi (Western, Sci-Fi, Thriller, 1969)
34		The War of the Worlds (Action, Sci-Fi, Thriller, 1953)
34		Untamed Women (Sci-Fi, War, 1952)
34		The Mole People (Adventure, Fantasy, Horror, Sci-Fi, 1956)
33		Unknown Island (Adventure, Horror, Romance, Sci-Fi, 1948)
33		The Brain from Planet Arous (Action, Adventure, Horror, Sci-Fi, 1957)
33		The Day of the Triffids (Horror, Sci-Fi, 1962)
33		When Worlds Collide (Action, Sci-Fi, Thriller, 1951)
33		Panther Girl of the Kongo (Action, Sci-Fi, 1955)
32		The Man with Two Heads (Horror, Sci-Fi, 1972)
32		The Lost Missile (Sci-Fi, 1958)
32		The Collective (Horror, Sci-Fi, Thriller, 2011)
32		Donovan's Brain (Sci-Fi, Horror, 1953)
32		Frankenstein Meets the Wolf Man (Fantasy, Horror, Sci-Fi, 1943)
32		Slime City Massacre (Action, Horror, Sci-Fi, 2010)
32		Evolution Creek (Adventure, Sci-Fi, Thriller, 2012)
32		Blood of the Beast (Horror, Sci-Fi, 2003)
32		The Dark (Horror, Sci-Fi, 1979)
32		Intergalactic Combat (Action, Adventure, Sci-Fi, 2007)
32		Rip Cage (Horror, Mystery, Sci-Fi, 2007)
32		The Crimson Ghost (Action, Adventure, Crime, Sci-Fi, 1946)
32		The Lost World (Adventure, Fantasy, Sci-Fi, 1992)
32		From the Dark (Drama, Horror, Sci-Fi, 2009)
32		Brainjacked (Horror, Sci-Fi, 2009)
32		BraveStarr: The Legend (Adventure, Animation, Sci-Fi, 1988)
32		Outlander (Action, Adventure, Sci-Fi, 2008)
32		Die, Monster, Die! (Mystery, Horror, Sci-Fi, 1965)
32		Syngenor (Horror, Sci-Fi, 1990)
32		Demonwarp (Horror, Mystery, Sci-Fi, 1988)
32		The Terror Within II (Horror, Sci-Fi, 1991)
32		Scourge (Horror, Mystery, Sci-Fi, 2008)
32		Midnight Special (Adventure, Drama, Sci-Fi, 2016)
32		The Arrival (Horror, Sci-Fi, 1991)
32		Death Street USA (Action, Sci-Fi, Horror, 1988)
32		Rejuvenatrix (Horror, Sci-Fi, 1988)
32		Target Earth (Horror, Sci-Fi, 1954)
32		Creature from the Black Lagoon (Horror, Sci-Fi, 1954)
32		Killer Ape (Adventure, Sci-Fi, 1953)
32		Chrysalis (Drama, Horror, Sci-Fi, 2014)
32		Invasion of the Body Snatchers (Horror, Sci-Fi, 1956)
32		Children of the X-Files (Horror, Sci-Fi, 2009)
32		The Terror Within (Horror, Sci-Fi, 1989)
32		Thru the Moebius Strip (Animation, Adventure, Sci-Fi, 2005)
32		The Maze (Horror, Sci-Fi, 1953)
32		The Neanderthal Man (Horror, Sci-Fi, 1953)
32		An Incident at Bridgeville (Horror, Mystery, Sci-Fi, 2005)
32		The Alien Factor (Horror, Sci-Fi, 1978)
32		Blood Beast from Outer Space (Horror, Sci-Fi, 1965)
32		Beyond the Dark (Horror, Sci-Fi, Thriller, 2014)
32		Jungle Jim in the Forbidden Land (Sci-Fi, Adventure, 1952)
32		It Came from Outer Space (Horror, Sci-Fi, 1953)
32		The Hiking Trip (Horror, Sci-Fi, Thriller, 2007)
32		Phantom from Space (Horror, Sci-Fi, 1953)
32		Port Sinister (Adventure, Crime, Sci-Fi, 1953)
31		Gorgo (Action, Drama, Horror, Sci-Fi, 1961)
31		World Without End (Adventure, Romance, Sci-Fi, 1956)
31		Bride of the Monster (Horror, Sci-Fi, 1955)
31		Revenge of the Creature (Horror, Sci-Fi, 1955)
31		This Island Earth (Horror, Mystery, Sci-Fi, 1955)
31		Creature with the Atom Brain (Crime, Horror, Sci-Fi, 1955)
31		Tarantula (Horror, Sci-Fi, 1955)
31		Captain Video, Master of the Stratosphere (Sci-Fi, Adventure, 1951)
31		Jungle Manhunt (Adventure, Sci-Fi, 1951)
31		Destination Moon (Adventure, Drama, Sci-Fi, 1950)
31		Vampire Hunter D: Bloodlust (Animation, Action, Adventure, Sci-Fi, 2000)
31		Two Lost Worlds (Adventure, Romance, Sci-Fi, 1951)
31		The Man from Planet X (Horror, Romance, Sci-Fi, 1951)
31		Five (Drama, Horror, Sci-Fi, 1951)
31		Day the World Ended (Horror, Sci-Fi, 1955)
31		The Quatermass Xperiment (Horror, Sci-Fi, 1955)
31		X the Unknown (Horror, Sci-Fi, 1956)
31		Savage Fury (Adventure, Sci-Fi, 1956)
31		The Gamma People (Drama, Horror, Sci-Fi, 1956)
31		The Werewolf (Sci-Fi, Horror, 1956)
31		The Incredible Shrinking Man (Drama, Horror, Sci-Fi, 1957)
31		The Black Sleep (Horror, Sci-Fi, 1956)
31		The Creature Walks Among Us (Horror, Sci-Fi, 1956)
31		It Conquered the World (Horror, Sci-Fi, Thriller, 1956)

Notes: Movies similar to The Beast from 20,000 Fathoms, Movies like The Beast from 20,000 Fathoms, Adventure, Horror, Sci-Fi, Eugène Lourié, Paul Hubschmid, Paula Raymond, Cecil Kellaway, Kenneth Tobey, SF, Science Fiction, SciFi, Sci Fi, Films, Video, Movie Similarities