Gloucester

Rare blue whale — world's largest animal — spotted off Gloucester

Cape Ann Whale Watch shared video of a gigantic blue whale off Massachusetts' coast

NBC Universal, Inc.

Whale watchers got a rare treat off the coast of Massachusetts Monday when they caught a glimpse of a rare blue whale.

Cape Ann Whale Watch shared video recorded Monday of the gigantic creature, the largest animal in the world, off the coast of Gloucester.

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"This whale was almost as long as our 115 foot boat," the company wrote on its Facebook page.

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