Sting of Death is a 1965 B-horror film directed by William Grefe and written by Al Dempsey and Herschell Gordon Lewis.Synopsis
A group of college kids travel south to Florida on spring break with their friend Karen, whose father, Dr. Richardson, is a marine biologist currently studying jellyfish. The kids, Louise, Jessica, Donna, Susan and Karen, stay with a man named Dr. John Hoyt. The kids insult and ridicule Dr. Richardson's assistant, Egon, who is in love with Karen. Egon creates a murderous jellyfish mutant which begins to go on a killing spree. Egon eventually brings Karen to his secret laboratory in the swamp. Dr. Richardson then arrives, keeping the monster at bay as he and Karen escape the lab as one of the machines causes the place to explode, destroying both Egon and his aquatic, bloodthirsty creation.
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