The movie Leviathan (1989) was directed by George Pan Cosmatos.

The Leviathan is actually the name of the sunken ship that contained the mutagen which created the underwater monster. The creature itself is a humanoid, tentacle-bearing mutant, consisting of different human parts, such as faces and limbs, similar to that of a Flood from the Halo series. The creature's face resembles a viperfish. A clear picture of the Leviathan monster can be found in the link below.

Satan is a scary leviathan. Enormous Leviathan is another phrase.

Kyogre is said it could possibly be a reference to the Leviathan, for the Leviathan was a giant sea monster.

The population of Leviathan - clothing - is 220.