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Shark Week•Season 30•Episode 4

Great Hammerhead Invasion

Jul 23, 201742 min
Discussion

Early November, giant hammerheads arrive off Bimini, in the Bahamas. But why? Leading shark scientist Tristan Guttridge tags and follows these normally solitary sharks to find out. Many appear to be pregnant females, as an ultrasound of a female hammerhead shows. Guttridge believes they spend