“Nereus” (*1/2 out of four) was a bizarre and boring horror thriller about a young woman (Itziar Martinez) who visits several friends and begins to have demented visions and is then attacked by an unearthly creature in her friend’s swimming pool and then has to convince her friends that anyone who comes into contact with the water is in severe danger. Give director/co-writer Georges Padey credit for attempting to make an arty type of horror movie but result is a real snooze. Martinez (who co-wrote the script) is solid but is unable to enliven the proceedings.