Update:

A Boston man faced charges of reckless endangerment for allegedly making up a story about a shark sighting off Martha’s Vineyard on Thursday, July 10, 2008, police said.

Michael Lopenzo, 60, is charged with telling people that he saw two 22-foot long sharks that weighed about 3,000 pounds each near State Beach, Edgartown Police Chief Paul Condlin said.

Lopenzo gave his address as 17 Court St., in Boston, which is the address of the New England Shelter for Homeless Veterans.

But there were two sightings at two different beaches Thursday. One at State Beach where parts of “Jaws” was filmed, and one at South Beach. Edgartown police say the sighting at State beach was the hoax, but the threat at South Beach was the real deal.

Lifeguards spotted the shark while they were doing drills in the water, and phoned in a biplane to get a better look. The pilot says that he did in fact spot the shark, a great white shark about 22 feet long!

Beachers also later saw a shark’s fin off State Beach.

See a news video here.