Zombie Lake (1981)
Le Lac des Morts Vivants
Eurociné
Dir. Jean Rollin
Pascale Vital as the Skinny-dipping Girl
Antonio Mayans (aka Robert Foster) as the Zombie Nazi
Certain prints of Zombie Lake credit director Jean Rollin under the pseudonym of J.A. Laser. The film was co-directed by Julian de Laserna, who went uncredited.
Henri-Jean Alliet handled the underwater photography, who clearly shot his scenes in a swimming pool; at times wall and floor tiles are clearly visible.