Headscratchers / Leviathan (1989)

• How many monsters were there, because it couldn't have just been one. There was the initial monster that was the fusion of Sixpack and Bowman, who were both dead while fusing. Cobb was infected by this monster before the body was flushed. Then Sixpack's amputated leg became a lamphrey monster that attacked and fused with De Jesus. Then Cobb mutated and infected Doc, presumably even though they were separate beings, once infected they met up again and fused together. The Dejesus creature was separate from them because Beck and Jones encountered it in the corridor while Cobb was attacking Doc. Beck killed the De Jesus creature when exiting the dive suit room with the lift, and then the Sixpack/Bowman creature is destroyed by Beck at the end with the explosive. That's at least three creatures by my count (four when Cobb and Doc were still mutating seperately), and the Cobb/Doc one is unaccounted for.