Leviathan is a 1989 science fiction horror film directed by George P. Cosmatos and written by David Webb Peoples and Jeb Stuart.

An international co-production of the United States and Italy, it stars Peter Weller, Richard Crenna, Ernie Hudson, Amanda Pays and Daniel Stern as the crew of an underwater geological facility stalked and killed by a hideous mutant creature.

Miss Martin, the CEO of Tri-Oceanic Corp., hires geologist Steven Beck to supervise an undersea mining operation for three months.

The crew consists of members Dr. Glen "Doc" Thompson, Elizabeth "Willie" Williams, Buzz "Sixpack" Parrish, Justin Jones, Tony DeJesus Rodero, Bridget Bowman and G.P.

While Beck and Doc confer with Martin on the surface, Bowman begins feeling ill. She finds Sixpack's corpse, which is mutating and growing.

He asks Cobb to watch the door, but when he searches for a weapon, the creature assimilates DeJesus and rips its way out of the kitchen.

This inspires Beck to use a pint of his blood to attract the monster, then attempt to flush it the same way they did with the Sixpack and Bowman creature.

Williams asks the computer for a financial report from the company and they discover that Tri-Oceanic Corporation has declared them dead, labeling it an accident.

Jones keeps it from escaping at the cost of his own life and Beck throws a demolition charge into the creature's mouth, causing it to explode.

[6] The score to the film was written by veteran composer Jerry Goldsmith, conducting The Accademia di Santa Cecilia Orchestra at Forum Studio.

Goldsmith used a number of creative ways to identify the score to the film, such as incorporating the use of recorded whale sounds into the music during the opening credits.

The soundtrack was released through Varèse Sarabande in 1989 and features eleven tracks of score with a running time just under forty minutes.

The site's critics consensus reads, "A deep-sea thriller with an unusually strong cast and potent ideas, Leviathan quickly plunges into an abyss of weak thrills and lame kills.

On their Siskel & Ebert series, Roger Ebert gave the film a thumbs up as a moderately effective, if clichéd, thriller, while his colleague Gene Siskel gave it a thumbs down, calling it a ripoff of several films that have come before it but nonetheless highlighting performances by Weller and Pays.