- Country: Spain
- Genres: Adventure, Horror
- Release: 2015-06-29
- Director: Amando de Ossorio
- Writers: Amando de Ossorio
- Language: Spanish | English
- Stars: Timothy Bottoms , Taryn Power , Jared Martin , Ray Milland , Gérard Tichy , Pepita Full James , Jack Taylor , León Klimovsky , Miguel de Grandy , Paul Benson
- Runtime: 92 min
- Awards: N/A
- AKA: Infierno en el mar (Mexico) , Hydra , Hydra (United States of America) , Hydra, le monstre des profondeurs (France, French Republic) , Hydra: Monster of the Deep , Serpiente de mar , Serpiente de mar (Spain) , Hydra - Die Ausgeburt der Hölle , The Sea Serpent (Norway) , Hydra (Portugal, Portuguese Republic) , The Sea Serpent (United States of America) , Гидра
- Plot: A nuclear detonation in the Atlantic re-animates a prehistoric sea monster. The creature terrorizes the Spanish coastline, attacking swimmers, boats and lighthouses without mercy. A sea captain whose ship was sunk by the monster and an American tourist whose best friend was killed by the beast team up to stop the monster, along with the help of respected oceanographer (Ray Milland).
- IMDB:tt0088089
The Sea Serpent Cast · · · ALL
Amando de Ossorio
Director
Timothy Bottoms
Pedro Fontán
Taryn Power
Margaret
Jared Martin
First Mate Lemaris
Ray Milland
Professor Timothy Wallace
Gérard Tichy
Carole James
Jill
Jack Taylor
Hospital Killer
León Klimovsky
Dr. Moore
Charly Bravo
Víctor Israel
Porto, Night Watchman
Pilar Alcón
Nurse (as Diana Eagle)
José Canalejas
Eduardo Bea
Alicia González
José Yepes
Jorge Bosso
Beatriz Savón
José Bastida
Barta Barri
Defensor
Paco Catalá
Fabián Conde
Alfonso de la Vega
Alfredo Enríquez
Luís Zagalo