The only I can think of right now (I’m sure there are much worse):
A.P.E (1976).
Space Warriors 2000 (1985))
Magic Lizard (1985).
Curse of the Screaming Dead (1982).
Guinea Pig: Mermaid in a Manhole (1988).
Nekromantik (1987) .
Zombi Holocaust (1981).
Tintorera (1977).
^Mermaid in a manhole sounds like a bad porno movie