Super-sensitive electric sensors enable them to track their prey better then any submarine and they have the weapons to finish it off, the Lemon shark.
Pole to Pole[]
SUPERB SENSES: With a sweet set of super senses to find prey, DEADLY GNASHERS: their rows of thin pointy teeth snag into fish, MASSIVE BITE: and their bite can swallow a beach ball,
Lemon sharks are a formidable fish munching machine with jaws for the job.
References:
Series 1: episode 17. Bahamas-Shark Special Series 1: episode 21 Killers Series 1: episode 26. Endangered