Jan Shepard

Danny Fisher, young delinquent, flunks out of high school. He quits his job as a busboy in a nightclub, and one night he gets the chance to perform. Success is imminent and the local crime boss Maxie Fields wants to hire him to perform at his night club The Blue Shade. Danny refuses, but Fields won't take no for an answer... (imdb)

After local-moonshine swilling trapper Lem Sawyer sees a giant creature, people start disappearing. While searching for illegal traps Steve Benton and Nan Greyson, his girl-friend find Lem dying with giant sucker wounds on his body. One couple Liz Walker and Cal Moulton, forced into the water by her enraged husband Dave Walker, gets taken by the leeches... (imdb)