Five years later, his father Preston King (Jeffrey Combs), a scientist, invites the doctors that could not save his son to his uncharted island in the western Pacific.

There, King reveals that Paul never died and was saved from death by being injected with hammerhead shark DNA to modify his stem cells.

King releases the water from the tank where he was keeping Paul, in hopes that he will eat the doctors as revenge for them firing him from his job five years previously.

Then the monster kills the wounded Bernie, then the doctor Katie Medevenko who sided with the protagonists to warn them about Dr. King's crazy plans and find cure for cancer but unfortunately falls into water after King's men attack where Hammerhead kills her, and he eats Jane alive while she tries to relieve her burns.

In his review, Condit wrote, "Hammerhead: Shark Frenzy has most of the usual problems movies of this type have – clichéd plot, subplots, supporting characters, and minor details that are introduced but never really followed through on, dull protagonists, illogical science, a monster that somehow manages to always be at just the right place at the right time, inconsistent special effects, etc.

You have a preposterously-plotted but perfectly watchable B-movie which, sadly, is let down by a number of clichés and a sense of being too self-conscious to embrace its ridiculousness and go all-out.