Richard Carlson

饰 Dr. David Reed

Julie Adams

饰 Kay Lawrence

Richard Denning

饰 Dr. Mark Williams

Antonio Moreno

饰 Dr. Carl Maia

Nestor Paiva

饰 Captain Lucas

Whit Bissell

饰 Dr. Edwin Thompson

Bernie Gozier

饰 Zee

Henry A. Escalante

饰 Chico

Ricou Browning

饰 The Gill Man In Water (uncredited)

Art Gilmore

饰 Narrator (voice) (uncredited)

佩里·洛佩兹

饰 Tomas (uncredited)

Sydney Mason

饰 Dr. Matos (uncredited)

Rodd Redwing

饰 Luis (uncredited)

James Miller

饰 Old Man (uncredited)

Ben Chapman

饰 The Gill Man On Land (uncredited)