Maneater of Hydra is a Spanish-German co-production released in 1967 directed by American expatriate Mel Welles. The alternate titles include La isla de la muerte, Island of the Doomed and The Blood Suckers (UK title). The horror film is set on a remote island off the shore of an unidentified European country, in which the central character is a mad scientist (Cameron Mitchell) who creates hybrid trees that feed on human blood.