Grace Casselberry attaches a tag to a great hammerhead shark's dorsal fin in the Lower Florida Keys. (IMAGE)

University of Massachusetts Amherst

Grace Casselberry attaches a tag to a great hammerhead shark's dorsal fin in the Lower Florida Keys.

Caption

Grace Casselberry attaches a tag to a great hammerhead shark's dorsal fin in the Lower Florida Keys.

Credit

Andy Danylchuk

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