where was it shot?
Martha's Vineyard and Emerald Coast.
Jaws 2
Martha's Vineyard was again used as the location for the town scenes and Emerald Coast was included on this film. 
where did the shark in jaws 2 come from UNANSWERABLE when was this film released? 1978
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Jaws 2 [SEP] Location
Martha's Vineyard was again used as the location for the town scenes and Emerald Coast was included on this film. Although some residents guarded their privacy, many islanders welcomed the money that the company was bringing. Shortly after the production arrived in June 1977, local newspaper the "Grapevine" wrote: Many residents enjoyed being cast as extras. Some people, however, were less pleased by the film crew's presence and refused to cooperate. Only one drugstore allowed its windows to be boarded up for the moody look that Hancock wanted. "Universal Go Home" T-shirts began appearing on the streets in mid-June 1977.