despite some dodgy camera work ( rapid zoom and shot throw in and out of focus ) and a few plodding moment and some dated look scene involve groovy teenager and mario bava a bay of blood be still an entertaining slasher or giallo movie and make even more notable by the fact that it heavily influence sean s. cunningham 80 classic and friday the 13th and make almost a decade later . the waterside setting and randy teenager and inventive bloody murder and vengeful son and and surprise end be all element borrow from bava movie while all cunningham have to do be dumb down the story a tad and he have one of the most successful horror movie of all time . in bava movie and a wealthy elderly woman be kill by her husband and who have be talk into commit the murder by his daughter and her greedy spouse and who wish to inherit and develop the titular bay . the murderous husband be then kill immediately after and by an unseen assailant . a the film progress and more and more people be kill in gory fashion and until bava reveals that there be several killer responsible and each have their own reason for commit the murder . the film end with a ridiculous twist and which make one wonder whether bava be have a bit of a laugh at the audience expense . fill his movie with plenty of bloody mayhem and nudity and bava establish the slasher formula that would prove successful for so many imitator . the bloody death scene include throat slashings and hanging and strangulation and and impalement to keep gore hound happy and whilst those who appreciate a bit of t and a with their horror will be more than happy with a gratuitous skinny dip scene feature a full frontal from brigitte skay . since a bay of blood have so much go for it and it be a shame that it tend to drag in place and have many dark scene in which it be hard to see what be happen . however and this be such an important movie that i do urge any self respecting horror fan to see it and if only to witness the film that initiate a whole sub genrethe slasher . if imdb allow it and i would award a bay of blood a rating of six and a half out of tensince i can not do this and i will round my score up to a respectable seven .