Sea Monster Size Comparison Lines Up Aquatic Sci-Fi Beasts

Science fiction universes are often full of ocean worlds and watery beasts. Despite their ubiquity, however, it’s hard to say which aquatic sci-fi monsters should (theoretically) scare the squid ink out of us the most. A new video comparing the sizes of oceanic sci-fi baddies from YouTuber and animator MetaBallStudios now gives us some sense, thankfully. And the comparison serves as a reminder that Bruce from Jaws is a guppy compared to a lot of other creatures lurking in the imaginary depths.

MetaBallStudios (or MBS) recently posted the above video to YouTube. For those unfamiliar, MBS—a Spanish animator by the name of Alvaro Gracia Montoya—has created countless size comparison videos before. Including many that showcase ships and other vehicles from the likes of Star Wars and Star Trek.

In this size comparison, Montoya lines up dozens and dozens of the most popular sci-fi sea creatures; beginning with Sheldon J. Plankton (2 inches tall) and SpongeBob (4 inches tall) from SpongeBob SquarePants. The fact Montoya has included both of these characters, incidentally, hints that this list of “monsters” includes a lot of friendly fictional sea creatures along with frightening ones.


Speaking of which, there are some genuine monsters from the deep in this lineup. After cruising past the Mosasaurus from Jurassic World (55 feet long) and the Megalodon from The Meg (75 feet long), things start to get truly gigantic. The Leviathan from Gears of War dwarfs the other creatures at 255 feet long, for one.

The sea monsters continue to grow in hugeness as Montoya shows Leatherback from Pacific Rim (265 feet tall), Godzilla from MonsterVerse (393 feet tall) and even H.P. Lovecraft’s Cthulhu, which Montoya notes is only described as being “hundreds of meters” tall. Things grow downright incredible, however, when Karathen from Aquaman appears at nearly two miles long, soon followed by Genbu from Naruto at approximately 3.1 miles long.


As for the biggest sea monsters in Montoya’s lineup? The second place finisher is Kraken from Warhammer 40,000 at roughly 25 miles long. And, finally, SCP-169 from the SCP Foundation; a creative fiction website detailing top-secret investigations, research, and containment policies of the paranormal. SCP-169, Montoya shows, is an astounding 3,100 miles long—give or take about 1,800 miles. Which makes us wonder: If these creatures are fictional, why are their measurements always so approximate? It seems like they should be less slippery.

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